Michalopoulou Μαρία, Aggeloussis Νίκος, Zisi Βασιλική, Ventouri Μαρία, Kourtessis Θωµάς, and Malliou Παρασκευή. 2006. “Physical Activity Patterns of Greek Adults Aged 60 – 90 Years: Age and Gender Effects”. Inquiries in Physical Education and Sport 4 (1):87-96. https://doi.org/10.26253/heal.uth.ojs.ispe.2006.1124.