Skrypka, A. V.; Drizhd, L. P.; Savelova, V. A.
Journal of Organic Chemistry USSR (English Translation), 1987 , vol. 23, # 5 p. 971 - 976
Zhurnal Organicheskoi Khimii, 1987 , vol. 23, # 5 p. 1075 - 1081