Manrao, M. R.; Kaur, Baljit; Sharma, R. C.; Kalsi, P. S.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1982 , vol. 21, # 11 p. 1059 - 1060
Selvaraj, S.; Rajendran, A. S.; Arumugam, N.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1987 , vol. 26, # 1-12 p. 1047 - 1049