Gevorkyan, A.A.; Kazaryan, P.I.; Avakyan, S.V.; Simonyan, E.S.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1989 , vol. 25, # 2 p. 225
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1989 , # 2 p. 269

Gevorkyan, A. A.; Kazaryan, P. I.; Avakyan, S. V.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1985 , vol. 21, # 4 p. 372 - 378
Khimiya Geterotsiklicheskikh Soedinenii, 1985 , vol. 21, # 4 p. 450 - 457

Gevorkyan, A. A.; Kazaryan, P. I.; Avakyan, S. V.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1985 , vol. 21, # 4 p. 372 - 378
Khimiya Geterotsiklicheskikh Soedinenii, 1985 , vol. 21, # 4 p. 450 - 457