Ungefug,G.A.; Roberts,C.W.
Journal of Organic Chemistry, 1973 , vol. 38, p. 153 - 155

Riemschneider
Chimica e l'Industria (Milan, Italy), 1952 , vol. 34, p. 266

Pews,R.G. et al.
Tetrahedron, 1970 , vol. 26, p. 1711 - 1717

Mustafaev, A. M.; Alekperov, N. A.; Guseinov, M. M.; Imamaliev, A. B.; Mekhtiev, S. I.
Journal of Organic Chemistry USSR (English Translation), 1985 , vol. 21, # 8 p. 1546 - 1552
Zhurnal Organicheskoi Khimii, 1985 , vol. 21, # 8 p. 1691 - 1696

Kitahara,Y. et al.
Bulletin of the Chemical Society of Japan, 1964 , vol. 37, p. 1399 - 1403

McBee,E.T.; Sienkowski,K.J.
Journal of Organic Chemistry, 1973 , vol. 38, p. 1340 - 1344