STANDARDIZATION OF VPO ASPHALTENE MOLECULAR WEIGHTLANG I; VAVRECKA P.1981; FUEL (GUILDF.); ISSN 0016-2361; GBR; DA. 1981; VOL. 60; NO 12; PP. 1176-1177; BIBL. 8 REF.Article

STABILITY OF SOME ORGANOMETALLIC COMPLEXES IN RELATION TO THEIR APPLICABILITY AS CATALYSTS IN HYDROREFININGVAVRECKA P; WEISSER O.1978; RIV. COMBUSTIBILI; ITA; DA. 1978; VOL. 32; NO 10; PP. 325-330; ABS. ITA; BIBL. 40 REF.Article

DELENI A ANALYZA POLYKARBONOVYCH KYSELIN V PRODUKTECH OXIDACE TUHYCH PALIV = SEPARATION AND ANALYSIS OF POLYCARBOXYLIC ACIDS IN THE OXIDATION PRODUCTS OF SOLID FUELS = SEPARATION ET ANALYSE DES ACIDES POLYCARBOXYLIQUES DES PRODUITS D'OXYDATION DES COMBUSTIBLES SOLIDESVAVRECKA P; DOBAL V; CERNY V et al.1980; ACTA MONTANA; ISSN 0365-1398; CSK; DA. 1980; NO 53; PP. 29-41; ABS. ENG/RUS; BIBL. 23 REF.Article

NUKLEARNI MAGNETICKA REZONANCE PRODUKTU ZKAPALNOVANI UHLI = THE NUCLEAR MAGNETIC RESONANCE OF COAL LIQUEFACTION PRODUCTS = LA RESONANCE MAGNETIQUE NUCLEAIRE DES PRODUITS DE LA LIQUEFACTION DU CHARBONLANG I; VAVRECKA P; SEBOR G et al.1980; UHLI; ISSN 0041-5812; CSK; DA. 1980; VOL. 28; NO 12; PP. 517-522; ABS. RUS/ENG/GER; BIBL. 55 REF.Article

PRELIMINARY RESULTS OF THE APPLICATION OF GEL SEPARATION OF RAW BENZENE CARBONIC ACIDSVAVRECKA P; VELEBIL Z; KESSLER MF et al.1975; ACTA MONTANA; TCHECOSL.; DA. 1975; NO 35; PP. 81-92; ABS. RUSSE ANGL. ALLEM.; BIBL. 22 REF.Article

THE DETERMINATION OF METALS IN PETROLEUM SAMPLES BY ATOMIC ABSORPTION SPECTROMETRY. I. DETERMINATION OF VANADIUM. = DOSAGE DE METAUX DANS LES ECHANTILLONS DE PETROLE PAR SPECTROMETRIE D'ABSORPTION ATOMIQUE. I. DOSAGE DU VSEBOR G; LANG I; VAVRECKA P et al.1975; ANAL. CHIM. ACTA; PAYS-BAS; DA. 1975; VOL. 78; NO 1; PP. 99-106; BIBL. 32 REF.Article

VANADIUM AND NICKEL PORPHYRINS AS STANDARDS FOR DIRECT DETERMINATION OF THESE METALS IN PETROLEUM BY ATOMIC ABSORPTION SPECTROPHOTOMETRY.VAVRECKA P; SEBOR G; LANG I et al.1975; RIV. COMBUSTIBILI; ITAL.; DA. 1975; VOL. 29; NO 9; PP. 375-379; ABS. ITAL.; BIBL. 10 REF.Article

NMR charakterizace frakcí z gelového dělení produktů hydrogenace uhlí I = Caractéristiques de la résonance magnétique nucléaire (RMN) des fractions de la séparation de gel des produits de l'hydrogénation du charbon IVAVREČKA, P; LANG, I.Uhlí. 1984, Vol 32, Num 3, pp 92-96, issn 0041-5812Article

NMR charakterizace frakcí z gelového dělení produktů hydrogenace uhlí. I = Caractérisation par spectrométrie RMN des fractions de séparation sur gel des produits de l'hydrogénation du charbon. 1ère partie = NMR characterization of the fractions from gel separation of the coal hydrogenation products. Part 1VAVRECKA, P; LANG, I.Uhlí. 1984, Vol 32, Num 3, pp 92-96, issn 0041-5812Article

STRUKTURNI CHARAKTERIZACE UHLE METODOU NUKLEARNI MAGNETICKE REZONANCNI SPEKTROMETRIE = CHARACTERIZATION OF COAL STRUCTURE BY THE METHOD OF NUCLEAR MAGNETIC RESONANCE SPECTROMETRY = CARACTERISATION DE LA STRUCTURE DU CHARBON PAR SPECTROMETRIE DE RESONANCE MAGNETIQUE NUCLEAIRELANG I; VAVRECKA P; SEBOR G JR et al.1977; ACTA MONTANA; CSK; DA. 1977 PUBL. 1978; NO 45; PP. 89-99; ABS. RUS/GER/ENG; BIBL. 9 REF.Article

Separation and identification of nitrogen compounds in coal-tar pitchCERNY, J; MITERA, J; VAVRECKA, P et al.Fuel (Guildford). 1989, Vol 68, Num 5, pp 596-600, issn 0016-2361Article