Akamanchi, K G; Meenakshi, R; Ranbhan, K J
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1992 , vol. 31, # 12 p. 908 - 910
Subramanian, M.; Mohan, P. S.; Shanmugam, P.; Prasad, K. J. Rajendra
Zeitschrift fuer Naturforschung, B: Chemical Sciences, 1992 , vol. 47, # 7 p. 1016 - 1020