Kimmelma, Reijo; Taskinen, Esko
Acta Chemica Scandinavica, Series B: Organic Chemistry and Biochemistry, 1987 , vol. 41, # 4 p. 271 - 277

Mursakulov, I. G.; Ramazanov, E. A.; Kerimov, F. F.; Abbasov, I. M.; Zefirov, N. S.
Journal of Organic Chemistry USSR (English Translation), 1990 , vol. 26, # 8.1 p. 1416 - 1425
Zhurnal Organicheskoi Khimii, 1990 , vol. 26, # 8 p. 1638 - 1647