Singh, S. P.; Sehgal, Subhash; Tarar, Lukhvinder Singh, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1989, vol. 28, # 1-11, p. 27 - 31
Singh, S. P.; Sehgal, Subhash; Tarar, Lukhvinder Singh, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1989, vol. 28, # 1-11, p. 27 - 31