Ismayilov А. Е., Aituganova Ж.Т., Shekerbayeva Ш.Н, Uypalakova Д.М., and Sydykova М.М. 2026. “GRAPH-MATRIX DESCRIPTION OF MULTI-CONTOUR INTERACTIONS IN A BIOTECHNOLOGICAL BEER FERMENTATION SYSTEM”. Bulletin of Abai KazNPU. Series of Physical and Mathematical Sciences 94 (2). Almaty, Kazakhstan:178-86. https://doi.org/10.51889/2959-5894.2026.94.2.015.