Kouthouris Χαρίλαος, Kontogianni Ευαγγελία, and Alexandris Κωνσταντίνος. 2008. “Constraints Toward Sport Recreation Participation”. Inquiries in Physical Education and Sport 6 (1):67-78. https://doi.org/10.26253/heal.uth.ojs.ispe.2008.1232.