Chemistry of Heterocyclic Compounds (New York, NY, United States), , vol. 20, # 4 p. 443 - 447
Khimiya Geterotsiklicheskikh Soedinenii, , vol. 20, # 4 p. 543 - 547
Chemistry of Heterocyclic Compounds (New York, NY, United States), , vol. 20, # 4 p. 443 - 447
Khimiya Geterotsiklicheskikh Soedinenii, , vol. 20, # 4 p. 543 - 547
