Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), , vol. 30, # 11 p. 2124 - 2132
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, , # 11 p. 2563 - 2571

Kauffmann; Burger
Journal of Organic Chemistry, 1954 , vol. 19, p. 1662,1664

Kozlova, I. K.; Luk'yanov, O. A.; Tartakovskii, V. A.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1981 , vol. 30, # 11 p. 2116 - 2123
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1981 , # 11 p. 2556 - 2563