Damianidis Χ., Kouthouris Χ. and Alexandris Κ. 2007. Perceived Constraints on Extracurricular Sports Recreation Activities among Students. The Case Study of Schools of Livadia City in Greece . Inquiries in Physical Education and Sport. 5, 3 (Dec. 2007), 379–385. DOI:https://doi.org/10.26253/heal.uth.ojs.ispe.2007.1215.