1. Fain, V.Ya., 9,10-Antrakhinony i ikh primenenie (9,10-Anthraquinones and Their Application), Moscow: Tsentr Fotokhimii Ross. Akad. Nauk, 1999.
2. Gorelik, M.V., Khimiya antrakhinonov i ikh proizvodnykh (Chemistry of Anthraquinones and Their Derivatives), Moscow: Khimiya, 1983, p. 29.
3. Gerasimenko, Yu.E. and Poteleshchenko, N.T., Zh. Org. Khim., 1971, vol. 7, p. 2415; Barachevskii, V.A., Lashkov, G.I., and Tsekhomskii, V.A., Fotokhromizm i ego primenenie (Photochromism and Its Applications), Moscow: Khimiya, 1977; Fokin, E.P., Klimenko, L.S., Russkikh, S.A., and Gritsan, N.P., Izv. Sib. Otd. Akad. Nauk SSSR, Ser. Khim. Nauk, 1981, no. 12, issue 5, p. 116.
4. Colour Index. I, 1971, vol. 4, p. 4557.
5. Tafeenko, V.A., Popov, S.I., and Medvedev, S.V., Dokl. Akad. Nauk SSSR, 1987, vol. 294, p. 1136.