Staskun, Benjamin; Es, Theodorus van
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1993 , # 4 p. 511 - 516
Misra, B. K.; Rao, Y. R.; Mahapatra, S. N.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1980 , vol. 19, # 10 p. 908 - 911