Herbarium LE - Specimens

N. Vietnam, Tam Dao Mountain, herb, flowers yellowish-green, 14.06.1981, sine coll., LX-VN 845

Vietnam, N. Vietnam, Ninh Binh province, Cuc Phuong National Park, primary tropical forest on limestone, 10 05 1963, Thai Van Trung, Luong Ngoc Toan, N.A. Avrorin, 606

Vietnam, N. Vietnam, Ninh Binh province, Cuc Phuong National Park, primary tropical forest on limestone, 13 05 1963, Thai Van Trung, Luong Ngoc Toan, N.A. Avrorin, 10318

Vietnam, N. Vietnam, Ninh Binh province, Cuc Phung National Park, primary tropical forest on limestone, 10 05 1963, Thai Van Trung, Luong Ngoc Toan, N.A. Avrorin, 006.

FLORA OF VIETNAM Fam. Convallaruiaceae Disporum sp. N. Vietnam, prov. Lao Cai, distr. Than Uyen, municipality Ho Mit (N 22°06' E 103°52'). Elevation to Mang Han San quartzite peak by SW slope from Ban Thao village (SSW macroslope of Hoang Lien Son ridge). Primary wet evergreen broadleaved forest on very steep rocky slope at 1800-2200 m elev. Terrestrial forb up to 1.5 m hg on shady steep slopes. Flowers dirty purple-violet. Not rare. No NTH 2810 21-22 May 1999 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98) Collectors: N.T.Hiep, P.H.Hoang, Averyanov L.

FLORA OF VIETNAM Fam. Convallariaceae Disporum sp. N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Dinh Phung, Nam Linh mt. (N 22°47' E 105°49'). Old secondary broadleaved wet mossy cloud forest along tops of remnant karst limestone Nam Linh ridge at 1550-1600 m alt. Terrestrial and lithophyte herb up to 0.5 m hg in deep shady karst crevices. Not rare. No CBL 1383 15 April 1999 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98) Collectors: P.K.Loc, P.H.Hoang, Averyanov L.

FLORA OF VIETNAM Liliaceae s.l. (Convallariaceae) Disporopsis sp. Quang Binh Prov., Minh Hoa Distr., Dan Hoa Municipality, Giang Man Ridge (Vietnam-Laos border) near Cha Lo Vietnam-Lao border gate around point 17°41'50"N 105°45'54"E. Primary evergreen broad-leaved wet forest on very steep mountain slopes and cliffs composed with shale and sandstone at elevation about 700-800 m a.s.l. Terrestrial herb to 1 m tall on shady rocky slope. Flowers white, anthers yellow. Common. HAL 12260 5 February 2009 Photo. Coll.: L.Averyanov, P.K.Loc, N.T.Vinh, L.T.Son.

FLORA OF VIETNAM Liliaceae Disporopsis longifolia Hoa Binh Prov., Lac Son Distr., Ngoc Son Municipality, Khu Village, Ngoc Rac Mt., around point 20°27'15"N 105°19'37"E. In heavily logged primary and secondary forests and woodlands on foot of limestone mts., at elevation about 550-600 m a.s.l. Perennial herb. ca. 0.7-1 m tall. . Flowers white. Rare. CPC 1679 28 March 2011 Coll.: N.Q.Hieu, L.Averyanov, N.T.Hiep, P.K.Loc, P.V.The, N.T.Vinh, T.B.Ngan, N.Tap, D.D.Dao, V.T.Ha.

FLORA OF VIETNAM Plants of Lai Chau Prov. Convallariaceae Disporopsis longifolia Craib Lai Chau Prov., Sin Ho Distr., Phin Ho Mun., Ta Genh vill., around point 22?28'44'' N, 103?16'23'' E, 1200 m. Slopes of limestone mountains. Terrestrial, in soil pockets between rocks. Rare. Flowers white. HAL 8795 12 Jun 2006 Photos. Collectors: P.K. Loc, N.T. Vinh, N.S. Khang, P.N. Quan and L.H. Phong. Collected with the financial support from the Program of Basic Researchs in Life Sciences, Vietnam.

FLORA OF VIETNAM Fam. Convallariaceae Polygonatum sp. N. Vietnam, prov. Son La, distr. Moc Chau, municipality Chieng Hac, vicinities of Co Liu village (N 20°51' E 104°38'). Primary evergreen broadleaved wet forest on very steep slopes and bluffs of remnant karst limestone ridge at 900-1000 m elev. Terrestrial forb up to 1.5 m hg in open place. Flowers light greenish-white. Stem at lower portion dirty purple. Common. No NTH 2952 29 May 1999 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98) Collectors: N.T.Hiep, P.H.Hoang, Averyanov L.

FLORA OF VIETNAM. Fam. Convallariaceae. Disporum sp. N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Ca Thanh,. about 3 km to SW from Yen Lac village (N 22°44' E 105°50'), about 42. km to NWW from Cao Bang town. Primary open coniferous mossy forest. (with Pseudotsuga brevifolia in 1 stratum) along tops of limestone karst. remnant ridge at 1400-1450 m alt. Epilite herb up to 40 cm hg. Ripe. fruits deep blue. Rare. No CBL 390   18 Nov. 1998. International Botanical Expedition of the U.S.A. National Geographic. Society (grant No 6300-98). . Collectors: Averyanov L., P.K.Loc, N.X.Tam.

FLORA OF VIETNAM Plants of Lai Chau Prov. Convallariaceae Disporopsis aspera (Hua) Engl. ex. Krause Lai Chau Prov., Sin Ho Distr., Xa De Phin Mun., Mao Xa Phin vill., around point 22?18'26'' N, 103?14'48'' E, 1579 m. Foots and slopes of limestone mountains. Lithophyte perennial herb; occasionally clustered on rocks. HAL 8715 08 Jun 2006 Photos Collectors: P.K. Loc, N.T. Vinh, N.S. Khang, P.N. Quan and T.A. Suu Collected with the financial support from the Program of Basic Researchs in Life Sciences, Vietnam.

FLORA OF VIETNAM Liliaceae ( sensu lato) Disporum sp. Ha Giang Prov., Bac Me District., Phieng Luong commune, Phieng Luong village, So Long mountaine. Primary evergreen broad- leaf forest on limestone at elevation 1000-1100 m a.s.l. Grows in soil limestone humus , on slope and top of mountaine at elevation 1135 m a.s.l. around point 220 38° 27.1°°N;1050 18° 48.1°°E, 1097 m a.s.l. Terestrial ? lithophytic herb 40-50 cm in height, flower white- green 06 April 2014, CPC 7287 ( Photo IMG 2329- 2332) Coll.: N. Q. Hieu, N.T.Hiep, N.N. Hung, T.Q. Ngan, T.P.Tuan, G.M. Pao

Herb. Fischer.

FLORA OF VIETNAM Liliaceae s.l. Polygonatum maculatum? Phu Tho Prov., Tan Son Distr., Xuan Son Municipality, Du village, around point 21°02'55"N 104°56'51"E. Primary broad-leaved forest on very steep rocky slopes and cliffs of Svoi Lap remnant mountain composed with highly eroded solid marble-like limestone at elevation 600-700 m a.s.l. Terrestrial and lithophytic herb to 1 m tall on very steep rocky slope and cliffs near to the top of ridge. Occasional. HAL 12705 17 February 2009 Coll.: L.Averyanov, P.K.Loc, N.T.Vinh, L.T.Son.

FLORA OF LAOS Convallariaceae Polygonatum sp. Vientiane prov., Kasi distr., between Pa Chao and Nam Ken villages, Pa Chao Mt., around point 19°19'35.5''N 102°22'57.7''E. Secondary broad-leaved evergreen dry forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1100-1200 m a.s.l. Lithophytic herb on shady steep rocky slope. Not rare. LA-VN 1769 27 March 2017 Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Khamla Inkhavilay, Hongthong Southyvohanh, Pinmany Sisavath, Chanthala Cheuaysamphanh.

FLORA OF VIETNAM Liliaceae s.l. (Convallariaceae) Polygonatum sp. Lai Chau Prov., Phong Tho Distr., Sin Suoi Ho Municipality, Sa Ma Pho village, around point 22°32'53"N 103°33'40"E. Secondary open evergreen broad-leaved forest and secondary woodlands on very steep mountain slopes composed predominantly with weathered granite at elev. about 1600-1800 m a.s.l. Lithophytic herb on shady mossy boulders on very steep shady rocky slope. Fruits dark red. Not common. HAL 10588 12 Dec. 2006 Coll.: Nguyen Tien Hiep, L.Averyanov, Phan Ke Loc, Pham Van The, N.T.Vinh.

FLORA OF VIETNAM Fam. Convallariaceae Polygonatum maculatum? N.Vietnam, Bac Kan Prov., Na Ri Distr., Liem Thuy Municipality, village Lung Vai, around point 21°57'18"N, 106°06'12"E, at elevation 500-700 m a.s.l. Primary broad-leaved evergreen closed wet forest on very steep slopes and cliffs of rocky ridges and mesae composed with white solid marble-like crystalline limestone. Terrestrial and lithophytic herb up to 2 m tall. Flowers and fruits white. Petiole dirty-purple marked. Occasional. No HAL 4990 28 May 2004 Collectors: L.Averyanov, N.T.Hiep, P.V.The, N.T.Vinh.

FLORA OF VIETNAM Liliaceae s.l. (Convallariaceae) Polygonatum sp. Lai Chau Prov., Tam Duong Distr., Ho Thau Community, Ho Thau village, around point 22°23'49"N 103°36'39"E. Primary closed evergreen broad-leaved forest on steep mountain slopes and along ridges composed with granite and shale at elev. about 1900-2350 m a.s.l. Tuberiferous epiphyte on tall mossy trees on steep slopes in ericaceious cloudy forest on tops of ridge. Fruits red. Occasional. HAL 10343 3 Dec. 2006 Coll.: Nguyen Tien Hiep, L.Averyanov, Pham Van The.

FLORA OF VIETNAM Liliaceae s.l. (Convallariaceae) Polygonatum sp. Lai Chau Prov., Sin Ho Distr., Ta Phin Municipality, around point 22°27'13"N 103°16'31"E. Remnants of broad-leaved evergreen closed primary forest on steep mountain slopes composed with solid crystalline highly eroded limestone at elev. 1100-1200 m a.s.l. Lithophytic herb on shady mossy cliffs. Occasional. HAL 9894 17 Nov. 2006 Coll.: Nguyen Tien Hiep, L.Averyanov, Pham Van The.

FLORA OF VIETNAM Fam. Convallariaceae Polygonatum sp. N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Dinh Phung, Nam Linh mt. (N 22°47' E 105°49'). Old secondary broadleaved wet mossy cloud forest along tops of remnant karst limestone Nam Linh ridge at 1550-1600 m alt. Epiphyte and lithophyte herb on open wet mossy vertical cliffs. Flowers pale greenish or white. Very common. No CBL 1397 15 April 1999 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98) Collectors: P.K.Loc, P.H.Hoang, Averyanov L.

FLORA VIETNAMICA,

FLORA VIETNAMICA N. Vietnam, Prov. Hoang Lien Son, Yen Bay, Dep tam, 05.05.1961, sine coll., 1887

FLORA VIETNAMICA, N. Vietnam, Prov. Lang Son, Nui Tien, 28.04.1961, sine coll., 1388.

Vietnam, Lam Dong province, Dalat town area, Suoi Vang, climbing herb to 2 m long, fruits blue, 28 12 1982, sine coll., LX-VN 981

FLORA OF VIETNAM Liliaceae s.l. (Convallariaceae) Polygonatum sp. Lai Chau Prov., Tam Duong Distr., Ho Thau Community, Ho Thau village, around point 22°25'20"N 103°36'13"E. Primary closed evergreen broad-leaved wet cloudy ericaceous forest on very steep mountain slopes and on tops of ridge composed predominantly with shale at elev. about 2600-2700 (according to GPS navigation system 3032 m) m a.s.l. Lithophytic and epiphytic herb on mossy rocky slope along streamlet. Fruits violet. Occasional. HAL 10445 7 Dec. 2006 Coll.: Nguyen Tien Hiep, L.Averyanov, Pham Van The.

FLORA VIETNAMICA, N. Vietnam, Prov. Hoang Lien Son, Sapa Town area, 20 05 1961, sine coll., 2329

FLORA OF VIETNAM Fam. Liliaceae s.l. Polygonatum kingianum Coll.et Hemsl. S. Vietnam, Prov. Kontum. Evergreen primary forest along stream (Dak Mek river system) at 850-900 m alt. on W slope of Ngoc Linh mountain system abowe Muong Hoong village. Herb up to 1.5 m high in open places. Flowers whitish. Not common. No VH 1354 14.04.1995 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5094-93) Participants: L. Averyanov, N.T. Ban, N. Q. Binh, A. Budantzev, L. Budantzev, N.T. Hiep, D.D. Huyen, P.K. Loc, N.X. Tam, G. Yakovlev

N. Vietnam, Lao Cai, Sapa town area, foothills of Phan Si Pan Mountains, humid woodlands above 1300 m, 04.06.1963, Luong Ngoc Toan, N.A. Avrorin 12314b

FLORA OF VIETNAM Fam. Convallariaceae Polygonatum kingianum Coll. et Hemsl. ? N. Vietnam, prov. Lai Chau, distr. Sin Ho, municipality Ta Ngau about 30 km of Lai Chau town to the N (N 22°18' E 103°15'). Secondary open wet mossy evergreen broadleaved forest with remnants of primary elements on rocky steep slope of remnant karst limestone ridge at elev. about 1650 m. Terrestrial forb up to 3 m hg on shady steep rocky slope. Flowers dull pink-purple with green tips of tepals. Rare. No NTH 2774 25 May 1999 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98) Collectors: N.T.Hiep, P.H.Hoang, Averyanov L.

FLORA OF VIETNAM Convallariaceae Polygonatum kingianum s.l. Dien Bien Prov., Tua Chua Distr., Trung Thu Municipality, Trung Thu Village, around point 21°55'38"N 103°18'05"E. Highly degraded primary evergreen broadleaved forest on very steep slopes and along remnant ridge composed with solid limestone at elevation 1350-1450 m a.s.l. Terrestrial and lithophytic herb to 2 m tall on shady rocky slope. Flowers light green to dull pink-red. Very common. CPC 2125 10 April 2011 Coll.: L.Averyanov, P.K.Loc, N.Q.Hieu, N.T.Vinh.

FLORA OF LAOS Convallariaceae Polygonatum kingianum Collett & Hemsl. Vientiane Prov., Kasi Distr., Thong Mout village, around point 19°26°51.5°N 102°07°45.8°E. Primary broad-leaved evergreen forest on very steep rocky slopes and on vertical cliffs of remnant highly eroded rocky limestone mountains composed by solid crystalline stratified limestone at elevation 1550-1650 m. Erect or scandent herb with stem to 1.5 m long in open slope among secondary scrub and on secondary grasslands. Flowers brightly red. Occasional. LA-VN 618 20 March 2013 Coll.: N.T.Hiep, L.Averyanov, N.S.Khang, P.V.The, S.Lorphengsy

FLORA OF LAOS Convallariaceae Polygonatum kingianum Collett & Hemsl. Vientiane Prov., Kasi Distr., Namken village, Phachao Mt., around point 19°18°45.5°N 102°22°31.4°E. Primary broad-leaved evergreen forest on very steep rocky slopes of remnant mountain composed with highly eroded solid crystalline limestone at elevations 1500-1750 m. Semi-erect, climbing herb to 1.5 long on mossy rocky slope near mountain top. Very common. LA-VN 858 24 March 2013 Coll.: L.Averyanov, N.S.Khang, S.Lorphengsy

FLORA OF VIETNAM Convallariaceae Polygonatum maculatum? Quang Binh Prov., Tuyen Hoa Distr., Lam Hoa municipality, Hung village, around point 17°55'41"N 105°49'43"E. Highly degraded primary and secondary evergreen broadleaved forest on very steep rocky slopes of remnant limestone hills composed with highly eroded marble-like crystalline limestone at elev. 200-300 m a.s.l. Lithophytic herb to 1.5 m tall in humid wet depression between limestone hills. Flowers white. Not rare. CPC 2598 1 May 2011 Coll.: L.Averyanov, P.K.Loc, N.Q.Hieu, P.V.The, N.T.Vinh.

FLORA OF VIETNAM Fam. Convallariaceae Polygonatum maculatum? N.Vietnam, Bac Kan Prov., Cho Don Distr., Ban Thi Municipality, village Phia Khao, around point 22°16'58"N, 105°31'20"E at elevation 800-900 m a.s.l. (Lung Chang and Lung Li mountains). Primary broad-leaved evergreen closed wet forest on very steep slopes and cliffs of rocky ridges and mesae composed with solid marble-like stratified limestone. Terrestrial and lithophytic herb up to 1 m tall. Flowers white, with green tint. Stalk brown-purple with green spots. Occasional. No HAL 4686 20 May 2004 Collectors: L.Averyanov, N.T.Hiep, P.V.The, N.T.Vinh.

FLORA OF VIETNAM Convallariaceae Polygonatum sp. Thanh Hoa Prov., Thuong Xuan Distr., Bat Mot Municipality, Vin village, Xuan Lien Natural Reserve. Remnants of primary broad-leaved evergreen humid forest on rocky, highly eroded, crystalline limestone at elevation 750-800 m a.s.l. around point 19°59°11.4°°N 104°58°31.8°°E. Lithophyte on mossy boulders and cliffs on very steep rocky mountain slope. Occasional. 1 November 2013 CPC 6485 L.Averyanov, N.T.Hiep, N.S.Khang

FLORA OF VIETNAM Convallariaceae Polygonatum maculatum? Quang Binh Prov., Tuyen Hoa Distr., Lam Hoa municipality, Hung village, around point 17°56'10"N 105°49'15"E, at elev. 150-200 m a.s.l. Highly degraded primary and secondary evergreen broadleaved forest on very steep rocky slopes of remnant limestone hills composed with highly eroded marble-like crystalline limestone. Lithophytic herb to 1 m tall on shady rocky slope. Flowers light green. CPC 2455 29 April 2011 Coll.: L.Averyanov, P.K.Loc, N.Q.Hieu, P.V.The, N.T.Vinh.

SIKKIM HIMALAYA Presented by Dr. Treutler, May 1875 116 20.5.74. 7000

5133 Convallaria punctata Wall. Napalia 1821 Polygonatum punctatum

FLORA OF VIETNAM Fam. Liliaceae s.l. Polygonatum sp. S. Vietnam, Prov. Kontum. Evegreen subcloud primary forest on NE slope of Ngoc Linh mountain system at 2200 m alt. Herb with stem up to 1.5 m high, sometimes epiphyte. Flowers whitish, fruits red. No VH 939 24.03.1995 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5094-93) Participants: L. Averyanov, N.T. Ban, A. Budantzev, L. Budantzev, N.T. Hiep, D.D. Huyen, P.K. Loc, G. Yakovlev

FLORA OF VIETNAM Fam. Convallariaceae Polygonatum sp. Northern Vietnam, Lao Cai Prov., Van Ban Distr., Khanh Yen Ha municipality, to the SW of Na Nheo village (in the vicinity of point 21°57'26"N, 104°13'00"E). Primary evergreen broad-leaved montane forest along granite/quartzite ridge at elev. 2200 m a.s.l. Terrestrial herb on very steep rocky slopes. Epiphytic herb on mossy trees in shady slope. Flowers white with green tips of tepals, stem green with purple-violet marks, bracts at the base of stem purple-violet. Common at elev. 2200-2650 m a.s.l. No HAL 2633 (Photo) 22 March 2002 Collectors: L.Averyanov, P.K.Loc, D.T.Doan (FFI Project).

FLORA OF VIETNAM Fam. Convallariaceae Polygonatum sp. N.Vietnam, Bac Kan Prov., Cho Don Distr., Ban Thi Municipality, village Phia Khao, around point 22°17'31"N, 105°31'51"E, Cau Muc mountain at elevation 800-900 m a.s.l. Primary broad-leaved evergreen closed forest on very steep slopes and cliffs near tops of rocky ridge composed with solid marble-like stratified limestone. Lithophytic herb on vertical cliff. Not rare. No HAL 4854 24 May 2004 Collectors: L.Averyanov, N.T.Hiep, P.V.The, N.T.Vinh.

FLORA OF VIETNAM Convallariaceae Dispoum sp. Nghe An Prov., Ky Son Distr., Na Ngoi Municipality, eastern slopes of Phu Xai Lai Leng Mountain. Primary very humid broad-leaved forest on steep mountain slopes composed of sandstone and gray shale at elevation about 2300 m a.s.l. around point 19°12°23.3°°N 104°11°33.7°°E. Terrestrial herb on steep slope. Fruits black. Common. 24 October 2013 CPC 6211 Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, L.M.Tuan, N.A.Trang, L.H.Dan

FLORA OF LAOS Convallariaceae Polygonatum punctatum Royle ex Kunth? Vientiane Prov., Kasi Distr., Namken village, Phachao Mt., around point 19°18°45.5°N 102°22°31.4°E. Primary broad-leaved evergreen forest on very steep rocky slopes of remnant mountain composed with highly eroded solid crystalline limestone at elevations 1500-1750 m. Lithophytic herb with bulbous thick creeping rhizome on exposed mossy rocks on rocky top of mountain. Flowers white. Very common. LA-VN 864 24 March 2013 Coll.: L.Averyanov, N.S.Khang, S.Lorphengsy

FLORA OF LAOS Convallariaceae Polygonatum sp. Vientiane Prov., Vang Vieng Distr., Na Po village, about 12 km to the W of Vang Vieng town, Pa Nang Oua Mt., around point 18°55°36.4°N 102°20°44.6°E. Dry broad-leaved secondary evergreen forest on very steep rocky slopes and on vertical cliffs of remnant highly eroded rocky limestone mountains composed by solid crystalline limestone at elevation 350-450 m. Terrestrial herb in shady places. Locally common. LA-VN 502 17 March 2013 Coll.: N.T.Hiep, L.Averyanov, K.Chantthavongsa, N.S.Khang, P.V.The, S.Lorphengsy

FLORA OF VIETNAM Fam. Convallariaceae Polygonatum sp. N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Dinh Phung, Nam Linh mt. (N 22°47' E 105°49'). Old secondary broadleaved wet mossy cloud forest along tops of remnant karst limestone Nam Linh ridge at 1550-1600 m alt. Epiphyte and lithophyte herb on open wet mossy vertical cliffs. Flowers pale greenish or white. Very common. No CBL 1395 15 April 1999 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98) Collectors: P.K.Loc, P.H.Hoang, Averyanov L.

FLORA OF VIETNAM Fam. Convallariaceae Polygonatum sp. N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Dinh Phung, Nam Linh mt. (N 22°47' E 105°49'). Old secondary broadleaved wet mossy cloud forest along tops of remnant karst limestone Nam Linh ridge at 1550-1600 m alt. Epiphyte and lithophyte herb on open wet mossy vertical cliffs. Flowers pale greenish or white. Very common. No CBL 1397 15 April 1999 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98) Collectors: P.K.Loc, P.H.Hoang, Averyanov L.

FLORA OF VIETNAM Convallariaceae Polygonatum sp. N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Dinh Phung, Nam Linh mt. (N 22°47' E 105°49'). Old secondary broadleaved wet mossy cloud forest along tops of remnant karst limestone Nam Linh ridge at 1550-1600 m alt. Epiphyte. Flowers light yellowish-green. Not common. No CBL 1417 15 April 1999 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98) Collectors: P.K.Loc, P.H.Hoang, Averyanov L.