1. Kairbekov, Zh.K., Aubakirov, E.A., and Smagulova, N.T., Use of the sludge of “coal oil,” Vestn. Kazan. Nats. Univ., Ser. Khim., 2002, no. 5, pp. 11–16.
2. Kairbekov, Zh.K., Gulmaliev, A.M., Aubakirov, E.A., et al., Structural and chemical parameters and properties of bitumen, in Mater. mezhd. nauch.-prakt. konf. “Tekhnologiya kompleksnoi pererabotki uglevodorodnogo syr’ya” (Proc. Int. Sci.-Pract. Conf. “Technology of Complex Processing of Hydrocarbon Materials”), Almaty: Kazakh. Univ., 2014, pp. 103–107.
3. Gulmaliev, A.M., Golovin, G.S., and Gladun, T.G., Teoreticheskie osnovy khimii uglya (Theoretical Basis of the Coal Chemistry), Moscow: Mosk. Gos. Gumanit. Univ., 2003.
4. Gulmaliev, A.M., Golovin, G.S., and Gagarin, S.G., Klassifikatsiya goryuchikh iskopaemykh po strukturnokhimicheskim pokazatelyam i osnovnye puti ispol’zovaniya iskopaemykh uglei (Classification of Combustible Fossils by Structural and Chemical Characteristics and the Main Use of Fossil Coal), Moscow: Trek, 2007.
5. Frisch, M.J., Trucks, G.W., Schlegel, H.B., et al., Gaussian 03, Revision C. 2, Pittsburgh, PA: Gaussian, 2003.