Razakou Φ., Tsapakidou Α., Beis Κ., and Tsompanaki Θ. “Investigating Concrete Factors Related to the 7-12 Year Old Children’s Occupation With Out of School Athleticism”. Inquiries in Physical Education and Sport, vol. 1, no. 2, May 2003, pp. 143-51, https://journals.lib.uth.gr/index.php/inquiries/article/view/1004.