Tsoi, L. A.; Salimbaeva, A. D.; Abiyurov, B. D.
Journal of Organic Chemistry USSR (English Translation), 1983 , p. 2287 - 2290
Zhurnal Organicheskoi Khimii, 1983 , vol. 19, # 12 p. 2605 - 2609

Cahours; Hofmann
Justus Liebigs Annalen der Chemie, 1857 , vol. 102, p. 296

Tsoi, L. A.; Salimbaeva, A. D.; Abiyurov, B. D.
Journal of Organic Chemistry USSR (English Translation), 1983 , p. 2287 - 2290
Zhurnal Organicheskoi Khimii, 1983 , vol. 19, # 12 p. 2605 - 2609

Papesch; Schroeder
Journal of Organic Chemistry, 1951 , vol. 16, p. 1879,1881,1887