Kravtsov, H.M., and D.H. Kravtsov. “nowledge ontrol odel of istance earning ystem ‘Kherson irtual University’”. Journal of Information Technologies in Education (ITE), no. 1 (May 8, 2007): 066–071. ccessed August 5, 2026. https://ite.kspu.edu/index.php/ite/article/view/698.