Koufou Ν., Michalopoulos Μ. and Kioumourtzoglou Ε. 2003. Contextual Interference Effects on Learning Volleyball Skills. Inquiries in Physical Education and Sport. 1, 2 (Jun. 2003), 159–168. DOI:https://doi.org/10.26253/heal.uth.ojs.ispe.2003.1005.