Trehan, I. R.; Kaul, R. L.; Sharma, R. K., Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1982, vol. 21, # 3, p. 197 - 199
Trehan, I. R.; Kaul, R. L.; Sharma, R. K., Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1982, vol. 21, # 3, p. 197 - 199