Sonawane, Yogesh A.; Rajule, Rajkumar N.; Shankarling, Ganapati S.
Monatshefte fur Chemie, 2010 , vol. 141, # 10 p. 1145 - 1151

Papavassiliou, G. C.; Yannopoulos, S. Y.; Zambounis, J. S.
Molecular Crystals and Liquid Crystals (1969-1991), 1985 , vol. 120, p. 333 - 336

Elokhina, V. N.; Nakhmanovich, A. S.; Karnaukhova, R. V.; Kalikhman, I. D.; Bannikova, O. B.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1984 , vol. 20, # 8 p. 862 - 865
Khimiya Geterotsiklicheskikh Soedinenii, 1984 , vol. 20, # 8 p. 1062 - 1065