Pesin, V. G.; Sergeev, V. A.; Ostashkova-Kul'kova, N. V.
Journal of Organic Chemistry USSR (English Translation), 1989 , vol. 25, # 8.2 p. 1626 - 1628
Zhurnal Organicheskoi Khimii, 1989 , vol. 25, # 8 p. 1799 - 1801