1. Shungity−novoe uglerodistoe syr’e (Shungites as New Carbonaceous Raw), Sokolov, V.A, Kalinin, Yu.K, and Dyukkiev, E.F., Eds., Petrozavodsk: Kareliya, 1984.
2. Betekhtin, A.G., Kurs mineralogii (Course of Mineralogy), Moscow: KDU, 2007.
3. Berezkin, V.I., Uglerod. Zamknutye nanochastitsy, makrostruktury, materialy (Carbon. Closed Nanoparticles, Macrostructures, Materials), St. Petersburg: AtrErgo, 2013.
4. Lugovskaya, I.G., Anufrieva, S.I., Golubtsov, N.V., and Krylova, A.V., Izv. Akad. Nauk, Ser. Khim., 2004, p. 1555.
5. Polunina, I.A., Vysotskii, V.V., Senchikhin, I.N., Polunin, K.E., Goncharova, I.S., Petukhova, G.A., and Buryak, A.K., Colloid J., 2017, vol. 79, p. 244.