Библиографическая ссылка:
Ахметзянов А.В., Кушнер А.Г., Лычагин В.В. Shock waves in initial boundary value problem for filtration in two-phase 2-dimensional porous media // Global and Stochastic Analysis. 2016. Vol. 3, No. 2. С. 41-46, http://www.mukpublications.com/resources/gsa-vol3-2-1-AkhKushLych.pdf.