Chatterjea, J. N.; Singh, K. R. R. P.; Jha, I. S., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1986, vol. 25, p. 796 - 798
Chatterjea, J. N.; Singh, K. R. R. P.; Jha, I. S., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1986, vol. 25, p. 796 - 798