Nikopoulou Μ., Tsitskaris Γ., Doganis Γ., and Kioumourtzoglou Ε. “Development of a Student Behavior Rating Scale According to Hellisons’ Model”. Inquiries in Physical Education and Sport, vol. 4, no. 1, Mar. 2006, pp. 19-28, https://journals.lib.uth.gr/index.php/inquiries/article/view/1114.