NOTIZ ZUR SYNTHESE DES (2,6-BIS(METHOXYCARBONYL)-5,6-DIHYDRO-4H-PYRAN-4-YLIDEN) ESSIGSAEURE-METHYLESTERS. = SYNTHESE DU (BIS-METHOXYCARBONYL-2,6 DIHYDRO-5,6 4H-PYRANNYLIDENE-4) ACETATE DE METHYLEKAPPLER D; ROSENMUND P.1976; CHEM. BER.; DTSCH.; DA. 1976; VOL. 109; NO 10; PP. 3486-3488; BIBL. 7 REF.Article

BEITRAG ZUR INTENSIVIERUNG DER ELEKTROLYTISCHEN BLEIRAFFINATION = CONTRIBUTION TO THE INTENSIFICATION OF THE ELECTROLYTIC LEAD REFININGLANGE HJ; KAPPLER D.1979; FREIBERG. FORSCHUNGSH., REIHE B; DDR; DA. 1979; VOL. B210; PP. 171-184; BIBL. 9 REF.Article