Dorokhov, V. A.; Gordeev, M. F.; Komkov, A. V.; Bogdanov, V. S.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1990 , vol. 39, # 1.2 p. 130 - 134
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1990 , # 1 p. 145 - 149

Harris, Roger L.N.
Synthesis, 1980 , # 10 p. 841 - 842

Huffman,K.R.; Schaefer,F.C.
Journal of Organic Chemistry, 1963 , vol. 28, p. 1816 - 1821

Huffman,K.R.; Schaefer,F.C.
Journal of Organic Chemistry, 1963 , vol. 28, p. 1812 - 1816