1. A. T. Il’ichev and G. G. Tsypkin, “Weakly linear theory for the instability of long-wave perturbations,” Dokl. Phys. 52, 499–501 (2007).
2. A. N. Kolmogorov, I. G. Petrovskii, and N. S. Piskunov, “Study of diffusion equation with an increase in the quantity of matter and its application to a biological problem,” Byull. Mosk. Gos. Univ. Mat. Mekh. 1(6), 1–26 (1937).
3. M. Bramson, “Convergence of Solutions of the Kolmogorov Equation to Travelling Waves,” (Am. Math. Soc., Providence, R.I., 1983).
4. K. Kirchgässner, “On the nonlinear dynamics of travelling fronts,” J. Differ. Equations 96, 256–278 (1992).
5. V. Zh. Arens, A. P. Dmitriev, and Yu. D. Dyad’kin, Thermophysical Aspects of Subsoil Resource Development (Nedra, Leningrad, 1988) [in Russian].