Ievlanov, Maksym, Nataliya Vasiltcova, and Iryna Panforova. 2018. “Development of Methods for the Analysis of Functional Requirements to an Information System for Consistency and Illogicality”. Eastern-European Journal of Enterprise Technologies 1 (2 (91):4-11. https://doi.org/10.15587/1729-4061.2018.121849.