Chakraborti, Asit K.; Ray, Jayanta K.; Kundu, Kalyan K.; Chakrabarty, Sephali; Mukherjee, Debabrata; Ghatak, Usha Ranjan Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1984 , # 2 p. 261 - 273