ISOLATION AND IDENTIFICATION OF COBALT-CONTAINING CHLORINES FROM ORGANIC MATTER OF THE BLACK SEA SHELF = ISOLEMENT ET IDENTIFICATION DE COMPOSES CHLORES AVEC COBALT PROVENANT DE LA MATIERE ORGANIQUE DE LA PLATEFORME CONTINENTALE DE LA MER NOIREKOVACHEV GL; YANKOV LK.1982; DOKLADY BOLGARSKOJ AKADEMII NAUK; ISSN 0366-8681; BGR; DA. 1982; VOL. 35; NO 6; PP. 785-788; BIBL. 8 REF.; ILL.Article

A STUDY ON THE N-ALKANE COMPOSITION IN CERTAIN BULGARIAN OIL SHALEYANKOV LK; LEKOVA KI; KURDJIEVA LI et al.1978; C.R. ACAD. BULG. SCI.; BGR; DA. 1978; VOL. 31; NO 7; PP. 849-852; BIBL. 8 REF.Article

IDENTIFICATION OF TETRATERPENOIDS IN OLIGOCENE OIL SHALE IN WESTERN BULGARIAYANKOV LK; KURDJIEVA LI; ANGHELOVA LK et al.1978; C.R. ACAD. BULG. SCI.; BGR; DA. 1978; VOL. 31; NO 4; PP. 437-440; BIBL. 9 REF.; 2 ILL.Article

CONTENT AND COMPOSITION OF THE ALKANES AND THE PRIMARY ALIPHATIC ALCOHOLS IN UNSAPONIFIABLES OF CITRULLUS COLOCYNTHIS L. SEED OIL.YANKOV LK; IVANOV CP; HUSSEIN SM et al.1975; C.R. ACAD. BULG. SCI.; BULG.; DA. 1975; VOL. 28; NO 8; PP. 1065-1068; BIBL. 6 REF.Article

RAPID RESEARCH METHOD FOR COMPOSITION OF LIGHT FRACTION OF HEAVY PYROLYSIS RESIN IN OLEFIN PRODUCTIONYANKOV LK; RAIKOVA ST; LEKOVA KI et al.1979; C.R. ACAD. BULG. SCI.; BGR; DA. 1979; VOL. 32; NO 4; PP. 489-492; BIBL. 9 REF.Article

STUDY OF THE COMPOSITION OF THE HEAVY PYROLYSIS TAR FROM OLEFINS PRODUCTIONYANKOV LK; RAJKOVA ST; LEKOVA KI et al.1980; AZERBAJDZH. KHIM. ZH.; SUN; DA. 1980; NO 2; PP. 97-103; ABS. AZE; BIBL. 15 REF.Article