George, T.; Rao, M. Kishore; Tahilramani, R.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1987 , vol. 26, # 1-12 p. 1127 - 1129
Reddy, Ch. K.; Reddy, P. S. N.; Ratnam, C. V.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1987 , vol. 26, # 1-12 p. 882 - 883