Korostova, S. E.; Shevchenko, S. G.; Shcherbakov, V. V.
Russian Journal of Organic Chemistry, 1993 , vol. 29, # 8.2. p. 1366
Zhurnal Organicheskoi Khimii, 1993 , vol. 29, # 8 p. 1639

Terent'ew et al.
Zhurnal Obshchei Khimii, 1955 , vol. 25, p. 1613,1615; engl. Ausg. S. 1571

Terent'ew et al.
Zhurnal Obshchei Khimii, 1955 , vol. 25, p. 1613,1615; engl. Ausg. S. 1571