Крайник, Я., Мулик, В., Окунь, Д. and Коваль, С. 2019. Use of special exercises for the development of motor qualities and the formation of technical and tactical actions of defenders 13–14 years in the preparatory period. Slobozhanskyi Herald of Science and Sport. 6(74) (Dec. 2019), 32–36. DOI:https://doi.org/10.15391/snsv.2019-6.005.