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HAAS, A., & HINSCH, W. (1972). ChemInform Abstract: PERHALOGENMETHYLMERCAPTO-HETEROCYCLEN 2. MITT. PERHALOGENMETHYLMERCAPTO-DERIVATE VON HYDROXYPYRIMIDINEN. Chemischer Informationsdienst, 3(26), no–no. doi:10.1002/chin.197226334 
10.1002/chin.197226334