Deodhar, K. D.; Kanekar, D. S.; Pabrekar, P. N., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1983, vol. 22, # 5, p. 512 - 514
Bhagwat, R. V.; Karambelkar, N. P.; Tiwari, Alok, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1982, vol. 21, # 5, p. 419 - 422