Kuliev, F. A.; Allakhverdiev, M. A.; Farzaliev, V. M.; Voronkov, M. G. Journal of Organic Chemistry USSR (English Translation), 1981 , vol. 17, p. 1517 - 1521 Zhurnal Organicheskoi Khimii, 1981 , vol. 17, # 8 p. 1699 - 1703