Tanaskov, M. M.; Starodub, P. E.; Stadnichuk, M. L.; Tanaskova, E. A.
Journal of Organic Chemistry USSR (English Translation), 1981 , vol. 17, p. 1609 - 1615
Zhurnal Organicheskoi Khimii, 1981 , vol. 17, # 9 p. 1800 - 1807