1. Admakin, L.A., State factors of organic system and petrogenesis of coal, Coke Chem., 2010, vol. 53, no. 8, pp. 281–289.
2. Admakin, L.A., Microelements and the Organic System of Coal, Coke Chem., 2014, vol. 57, no. 8, pp. 321–331.
3. Vernadskii, V.I., Izbrannye sochineniya. T. 1 (Selected Works. Vol. 1), Moscow: Izd. Akad. Nauk SSSR, 1960.
4. Korzhinsky, D.S., Teoreticheskie osnovy analiza paragenezisa mineralov (Theoretical Basis for the Analysis of the Petrogenesis of Minerals), Moscow: Nauka, 1973.
5. Ivanova, F.I. and Krivega, N.N., Solenye ugli Zapadnogo Donbassa (Saline Coal of Western Donbass), Kiev: Naukova dumka, 1985.