Konyrkulzhayeva М.N. “THE DIRICHLET PROBLEM ON THE ORIENTED GRAPHS”. Bulletin of Abai KazNPU. Series of Physical and mathematical sciences 70, no. 2 (June 30, 2020): 84–90. Accessed December 4, 2024. https://bulletin-phmath.kaznpu.kz/index.php/ped/article/view/27.