1. Sammes, M.P., Pyrroles. Part One: The Synthesis and the Physical and Chemical Aspects of the Pyrrole Ring, Jones, R.A., Ed., Hoboken, NY: Wiley 1990, p. 549.
2. Shabalin, D.A., Schmidt, E.Yu., and Trofimov, B.A., Targets in Heterocyclic Systems, Attanasi, O.A., Merino, P., and Spinelli, D., Eds., Roma: Soc. Chim. Ital. 2017, vol. 21, p. 54.
3. Trofimov, B.A., Shevchenko, S.G., Korostova, S.E., Mikhaleva, A.I., and Shcherbakov, V.V., Chem. Heterocycl. Compd. 1985, vol. 21, p. 1299.
4. Korostova, S.E., Shevchenko, S.G., and Sigalov, M.V., Chem. Heterocycl. Compd. 1991, vol. 27, p. 1101.
5. Trofimov, B.A., Mikhaleva, A.I., Schmidt, E.Yu., and Sobenina, L.N., Chemistry of Pyrroles, Boca Raton: CRC, 2015.