Kyrgyridis Π., Derri Β., and Kioumourtzoglou Ε. “Factors That Contribute to Effective Teaching in Physical Education: A Review”. Inquiries in Physical Education and Sport, vol. 4, no. 3, Dec. 2006, pp. 409-1, https://journals.lib.uth.gr/index.php/inquiries/article/view/1155.