1. V. G. Granik, G. Ya. Shvarts, S. I. Grizik, et al., Khim. Farm. Zh., No. 12, 1428–1434 (1987).
2. V. G. Granik, S. I. Grizik, I. F. Faermark, et al., Khim. Farm. Zh., No. 11, 1320–1323 (1989).
3. British Patent No. 811,816 (1959)
4. Chem. Abstr.,54, No. 576d (1960).
5. K. K. Sidorov, Toxicology of New Commercial Medicinal Substances [in Russian], Leningrad (1973).