1. A. S. Brysaev, "Pharmaceutical analysis of indole derivatives by a flow-injection method," Candidate Dissertation in Chemical Sciences, Kazan (2004).
2. A. J. Scott and P. C. Cherry, J. Am. Chem. Soc., 91, 5872–5874 (1969).
3. V. V. Marysheva, P. A. Torkunov, and P. D. Shabanov, Byull. Eksp. Biol. Med., 141, 418–421 (2006).
4. B. A. Bguasheva, I. A. Varlashkina, P. A. Galenko-Yaroshevskii, Kh. P. Takhchidi, S. N. Sakhnov, K. F. Suzdalev, and M. N. Babakova, Byull. Eksp. Biol., Suppl., 3, 142–145 (2007).
5. M. I. Borshchevskaya and S. M. Vasil’eva, Vopr. Med. Khim., No. 1 (1999); http://medi.ru/pbmc/8890102.htm