Trofimov, B. A.; Lavrov, V. I.; Parshina, L. N.; Alekankin, V. N.; Stankevich, V. K.; Grigorenko, V. I. Journal of Organic Chemistry USSR (English Translation), 1982 , vol. 18, p. 462 - 465 Zhurnal Organicheskoi Khimii, 1982 , vol. 18, # 3 p. 528 - 531