Gupta, A. K.; Singh, V. K.; Pant, Umesh C., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1983, vol. 22, # 10, p. 1057 - 1059
Gupta, A. K.; Singh, V. K.; Pant, Umesh C., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1983, vol. 22, # 10, p. 1057 - 1059