Hung , Dr. Nguyen Xuan. “The System of Professional Supplementary Exercises Applied in Teaching Basic Overhand Volleyball Passing Technique for Volleyball-Intensive Students in Danang University of Physical Education and Sports”. American Scientific Research Journal for Engineering, Technology, and Sciences 88, no. 1 (June 14, 2022): 145–156. Accessed May 3, 2024. https://www.asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/7637.