1. V. N. Shchelkachev, Fundamentals and Applications of the Theory of Unsteady Filtration. Monograph in 2 parts [in Russian], Neft’ i Gaz, Moscow (1995), Part 1.
2. G. I. Barenblatt, V. M. Entov, and V. M. Ryzhik, Motion of Liquids and Gases in Natural Formations [in Russian], Nedra, Moscow (1984).
3. I. A. Charnyi, Underground Hydrogasdynamics [in Russian], Izd. Inst. Komp. Issled. (IKI), Izhevsk (2006).