Akhmetova О., and S.A. Issayev. 2025. “STATIONARY DIFFUSION MODEL IN HETEROGENEOUS MEDIA WITH SMALL PARAMETERS”. Bulletin of Abai KazNPU. Series of Physical and Mathematical Sciences 90 (2). Almaty, Kazakhstan:18-35. https://doi.org/10.51889/2959-5894.2025.90.2.002.