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ČMELÍK, Richard; Michal CAJAN; Jaromír MAREK a Pavel PAZDERA. Syntheses and Structure Study on 3,3alambda4,4-Trithia-1-azapentalenes and Their 3-Oxa Analogues. Collection of Czechoslovak Chemical Communications. 2003, roč. 68, č. 7, s. 1243-1263, 11 s. ISSN 0010-0765.Podrobněji: https://is.muni.cz/publication/488354/cs