Malikova Ф.Ө, Toleushova А.Т, and Ryskeldi Р.С. 2021. “SIGNATURE VISUALIZATION METHOD”. Bulletin of Abai KazNPU. Series of Physical and Mathematical Sciences 69 (1). Almaty, Kazakhstan:370-73. https://bulletin-phmath.kaznpu.kz/index.php/ped/article/view/221.