Kreitsberga, Ya. N.; Bite, D. V.; Kampar, V. E.; Kampare, R. B.; Neiland, O. Ya.
Journal of Organic Chemistry USSR (English Translation), 1981 , vol. 17, p. 931 - 937
Zhurnal Organicheskoi Khimii, 1981 , vol. 17, # 5 p. 1055 - 1062