“APPLYING THE BORG’S RATINGS OF PERCEIVED EXERTION SCALE TO ASSESS MOTOR DEVELOPMENT IN ONLINE UNIVERSITY LEARNING”. TRAKIA JOURNAL OF SCIENCES 22, no. Supplement 1 (April 4, 2025): 6. Accessed April 4, 2025. https://tjs.trakia-uni.bg/index.php/tjs/article/view/107.