1. G. Ya. Galin, “Shock Waves in Media with Arbitrary Equations of State,” Soviet Physics. Dokl. 119(3), 244–247 (1958).
2. O. A. Oleinik, “Construction of a Generalized Solution of the Cauchy Problem for a Quasi-linear Equation of First Order by the Introduction of ‘Vanishing Viscosity’,” Am. Math. Soc., Transl., II. Ser. 33, 277–283 (1963)
3. G. Ja. Galin, “A Theory of Shock Waves,” Soviet Physics. Dokl. 4, 757–760 (1960).
4. I. M. Gel’fand, “Some Problems in the Theory of Quasilinear Equations,” Transl., Ser. 2, Am. Math. Soc. 29, 295–381 (1963).
5. Ya. B. Zel’dovich, G. I. Barenblatt, V. B. Librovich, and G. M. Makhviladze, Mathematical Theory of Combustion and Explosion (Nauka, Moscow, 1980) [in Russian].