Žilvinskis, Imants. “DEVELOPMENT OF WEB-BASED INFORMATION SYSTEM (DISTANCE EDUCATION INFORMATION SYSTEM)”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 20, 2001): 301–303. Accessed May 6, 2024. https://journals.ru.lv/index.php/ETR/article/view/1968.