Preidys, Saulius, and Leonidas Sakalauskas. “Analysis of students’ Study Activities in Virtual Learning Environments Using Data Mining Methods”. Technological and Economic Development of Economy 16, no. 1 (March 31, 2010): 94-108. Accessed December 2, 2024. https://aviation.vgtu.lt/index.php/TEDE/article/view/5843.