Kuchin, A. V.; Tolstikov, A. G.; Gorobets, E. V.; Odinokov, V. N.; Grechkin, A. N.; Tolstikov, G. A.
Doklady Chemistry, 1989 , vol. 308, # 1-3 p. 261 - 263
Doklady Akademii Nauk SSSR, 1989 , vol. 308, # 2 p. 384 - 386
Ranganathan, S.; Maniktala, Vibha; Kumar, Raaj; Singh, G. P.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1984 , vol. 23, # 12 p. 1197 - 1207