Cerchez; Colesiu
Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1932 , vol. 194, p. 1955

Mishchenko, A. I.; Prosyanik, V. A.; Belov, P. N.; Romanchenko, V. A.; Belova, E. G.; Markov, V. I.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1984 , vol. 20, # 3 p. 270 - 274
Khimiya Geterotsiklicheskikh Soedinenii, 1984 , vol. 20, # 3 p. 338 - 342

Cerchez; Colesiu
Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1932 , vol. 194, p. 1955

Mishchenko, A. I.; Prosyanik, V. A.; Belov, P. N.; Romanchenko, V. A.; Belova, E. G.; Markov, V. I.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1984 , vol. 20, # 3 p. 270 - 274
Khimiya Geterotsiklicheskikh Soedinenii, 1984 , vol. 20, # 3 p. 338 - 342