Rao, P. Jayaprasad; Reddy, K. Kondal
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1983 , vol. 22, p. 117 - 120
Demik, N. N.; Kabachnik, M. M.; Novikova, Z. S.; Beletskaya, I. P.
Russian Journal of Organic Chemistry, 1995 , vol. 31, # 1.1 p. 57 - 60
Zhurnal Organicheskoi Khimii, 1995 , vol. 31, # 1 p. 64 - 68