Bertaki Χ., Michalopoulou Μ., Argyropoulou Ε. Χ., and Bitzidou Χ. “Physical Activity Levels of Greek High School Students”.
Inquiries in Physical Education and Sport
, vol. 5, no. 3, Dec. 2007, pp. 386-95, doi:10.26253/heal.uth.ojs.ispe.2007.1216.