1. Savvin, S.B., Shtykov, S.N., and Mikhailova, A.V., Russ. Chem. Rev., 2006, vol. 75, no. 4, p. 341. https://doi.org/10.1070/RC2006v075n04ABEH001189
2. Fialkov, Yu.A., Rastvoritel’ kak sredstvo upravleniya khimicheskim protsessom (Solvent as a Tool for Chemical Process Controlling), Leningrad: Khimiya, 1990.
3. Savvin, S.B. and Kuzin, E.L., Elektronnye spektry i struktura organicheskikh reagentov (Electronic Spectra and Structure of Organic Reagents), Moscow: Nauka, 1974.
4. Sabnis, R.W., Handbook of Acid-Base Indicators, Boca Raton: CRC Press, 2008, p. 416.
5. Chebotarev, A.N., Snigur, D.V., Zhukova, Yu.P., Bevziuk, K.V., Studenyak, Ya.I., and Bazel, Ya.R., Russ. J. Gen. Chem., 2017, vol. 87, no. 2, p. 196. https://doi.org/10.1134/S1070363217020074