KUCHARCZUK-KOPYCIŃSKA, Magda, KRAJEWSKI, Stanisław and KRAJEWSKA, Małgorzata. Assessment and affects hamstrings contracture on the formation of posture defects in children of preschool age. Journal of Education, Health and Sport. Online. 31 December 2016. Vol. 6, no. 13, pp. 135-145. [Accessed 1 September 2024].