Russell, Glen A.; Kulkarni, Shekhar V.; Khanna, Rajive K.
Journal of Organic Chemistry, 1990 , vol. 55, # 3 p. 1080 - 1086

Niyazymbetov, Murat E.; Rongfeng, Zhou; Evans, Dennis H.
Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999), 1996 , # 9 p. 1957 - 1962