Petraki Χριστίνα, Derri Βασιλική, Gaintatzis Στέργιος, and Aggeloussis Νικόλαος. 2006. “Relation Between Parent’s and Children’s Physical Activity in Urban Regions of North Greece”. Inquiries in Physical Education and Sport 4 (1):1-10. https://doi.org/10.26253/heal.uth.ojs.ispe.2006.1112.