1. R. Kh. Muslimov, G. V. Romanov, G. P. Kayukova, et al., Integrated Development of Heavy Oils and Natural Bitumens from the Permian System of the Republic of Tatarstan (Fen, Kazan, 2012) [in Russian].
2. R. S. Khisamov, N. S. Gatiyatullin, I. E. Shargorodskii, et al., Geology and Development of Natural Bitumen Deposits in the Republic of Tatarstan (Fen, Kazan, 2007) [in Russian].
3. N. K. Nadirov, G. A. Musaev, G. V. Romanov, et al., Neftekhimiya 31, 781 (1991).
4. N. A. Repyakh, Yu. M. Ganeeva, T. N. Yusupova, et al., Vestn. Kazansk. Tekhnol. Univ. 15, 170 (2012).
5. G. P. Kayukova, B. V. Uspenskii, I. M. Abdrakhikova, and R. Z. Musin, in Proceedings of International Scientific–Practical Conference “High-Viscosity Oils and Natural Bitumens: Problems and Improvement in Exploration and Development (2012), p. 208.