Κοντογιάννη Π, Κοντογιάννη Ν, Τσαμίτα Ι. Relationship between self-determination and stage of change of physical activity behavior of Greek students. Psychology [Internet]. 2020 Oct. 15 [cited 2024 Jul. 18];17(1):52-70. Available from: https://ejournals.epublishing.ekt.gr/index.php/psychology/article/view/23754