Нургабыл, Д. ., and К. . Нурпеисов. “CONSTRUCTION OF SECTIONS OF POLYHEDRON METHOD OF TRACES”. Bulletin of Abai KazNPU. Series of Physical and Mathematical Sciences, vol. 69, no. 1, June 2021, pp. 144-9, https://bulletin-phmath.kaznpu.kz/index.php/ped/article/view/227.