Iskakova А.К., Berkimbaeva С.Б., Akkoziyeva Р.С., and Yeleussinova А.У. 2020. “E-DOCUMENT SYSTEMS: TRENDS AND PERSPECTIVES”. Bulletin of Abai KazNPU. Series of Physical and Mathematical Sciences 72 (4). Almaty, Kazakhstan:196-201. https://doi.org/10.51889/2020-4.1728-7901.30.