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
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