Bekbauova А. “ABOUT SOLUTIONS IN THE BROAD SENSE OF NONLINEAR SYSTEMS IN PARTIAL DERIVATIVES OF THE FIRST ORDER”. Bulletin of Abai KazNPU. Series of Physical and Mathematical sciences 89, no. 1 (March 27, 2025): 28–37. Accessed December 15, 2025. https://bulletin-phmath.kaznpu.kz/index.php/ped/article/view/2086.