Koutelidas Α., Digelidis Ν. and Syrmpas Ι. (2019) “Applying Hellison’s Responsibility Model in Elementary School Physical Education Classes: A Practical Inquiry Approach”, Inquiries in Physical Education and Sport, 17(2), pp. 97–110. doi: 10.26253/heal.uth.ojs.ispe.2019.1528.