1. N. T. Levashova, A. A. Melnikova, D. V. Luk’yanenko, and A. E. Sidorova, S. V. Bytsura, “Modeling of ecosystems as a process of self-organization [in Russian],” Matem. Mod., 29, 40–52 (2017).
2. A. E. Sidorova, N. T. Levashova, and A. E. Semina, “Autowave model of megapolis morphogenesis in the context of inhomogeneous active media,” Bull. Russ. Acad. Sci. Phys., 83, 91–96 (2019).
3. N. T. Levashova and B. V. Tischenko, “Existence and stability of the solution to a system of two nonlinear diffusion equations in a medium with discontinuous characteristics,” Comput. Math. Math. Phys., 61, 1811–1833 (2021).
4. C. V. Pao, Nonlinear Parabolic and Elliptic Equations, Plenum Press, New York (1992).
5. N. N. Nefedov, “The method of differential inequalities for some classes of nonlinear singularly perturbed problems with internal layers,” Differ. Equ., 31, 1077–1085 (1995).