Feuer, Henry; Bevinakatti, Hanamanthsa S.; Luo, Xuan-Gan
Journal of Heterocyclic Chemistry, 1987 , vol. 24, p. 9 - 13

Yurtanov, A. I.; Kovalenko, S. V.; Martynov, I. V.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1985 , vol. 34, p. 2610 - 2611
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1985 , # 12 p. 2814 - 2815