Kozlov, A. P.; Ryabova, V. V.; Andreichikov, Yu. S.
Journal of Organic Chemistry USSR (English Translation), 1987 , vol. 23, # 8 p. 1492 - 1497
Zhurnal Organicheskoi Khimii, 1987 , vol. 23, # 8 p. 1665 - 1670