Petraki Χ., Derri Β., Gaintatzis Σ., and Aggeloussis Ν. “Relation Between Parent’s and Children’s Physical Activity in Urban Regions of North Greece”. Inquiries in Physical Education and Sport, vol. 4, no. 1, Mar. 2006, pp. 1-10, https://journals.lib.uth.gr/index.php/inquiries/article/view/1112.