Ryabukhin, Sergey V.; Plaskon, Andrey S.; Volochnyuk, Dmitriy M.; Tolmachev, Andrey A.
Synthesis, 2006 , # 21 p. 3715 - 3726

Chalapathi Rao, C. V.; Kondal Reddy, K.; Rao, N. V. Subba
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1980 , vol. 19, # 11 p. 967 - 969