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2. R. A. Muzychkina, Natural Anthraquinones. Biological Properties and Physicochemical Characteristics [in Russian], G. A. Tolstikov, ed., Fazis, Moscow (1998).
3. V. Ya. Fain, 9,10-Anthraquinones and Their Use [in Russian], Photochemistry Center of RAS, Moscow (1999).
4. M. V. Gorelik, Chemistry of Anthraquinones and Their Derivatives [in Russian], Khimiya, Moscow (1983).
5. L. S. Klimenko, Doctoral Dissertation in Chemical Sciences, Inst. Org. Khim., Sib. Div. RAS, Novosibirsk (2004).