Kyazimov, A. S.; Abdullabekov, I. M.; Karaev, S. F. Journal of Organic Chemistry USSR (English Translation), 1988 , vol. 24, # 8 p. 1456 - 1458 Zhurnal Organicheskoi Khimii, 1988 , vol. 24, # 8 p. 1615 - 1617