Farbenfabr.Bayer
Patent: DE947367 , 1954 ;

Fokin,A.V. et al.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1974 , vol. 23, p. 2740 - 2743
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1974 , vol. 23, p. 2837 - 2840

Farbenfabr.Bayer
Patent: DE818352 , 1949 ;
DRP/DRBP Org.Chem.
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Farbenfabr.Bayer
Patent: US2640847 , 1949 ;

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Farbenfabr.Bayer
Patent: US2597534 , 1949 ;

Farbenfabr.Bayer
Patent: DE926488 , 1953 ;

Fokin,A.V. et al.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1974 , vol. 23, p. 2740 - 2743
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1974 , vol. 23, p. 2837 - 2840