Ayyangar, N. R.; Kalkote, U. R.; Nikrad, P. V., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1983, vol. 22, # 9, p. 872 - 877
Ayyangar, N. R.; Kalkote, U. R.; Nikrad, P. V., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1983, vol. 22, # 9, p. 872 - 877