Chatzopoulos ∆ηµήτρης, Kofterou Αθηνά, and Georgiou Μαρία. 2003. “Multifaceted Exercise of Balance and Pedagogic Framework of Its Application in Primary Education”. Inquiries in Physical Education and Sport 1 (2):176-83. https://journals.lib.uth.gr/index.php/inquiries/article/view/1008.