Asst. Lecturer Hayder Hasan Karam. “THE IMPACT OF CONTRASTING EVENTS STRATEGY ON MOTOR SATISFACTION AND LEARNING PERFORMANCE OF VOLLEYBALL BLOCKING SKILL FOR SECOND-STAGE COLLEGE STUDENTS”. Galaxy International Interdisciplinary Research Journal, vol. 11, no. 8, Aug. 2023, pp. 71-80, https://giirj.com/index.php/giirj/article/view/5667.