Potop, V., Grad, R., Omelyanchik, O., Begajlo, M. and Boloban, V. (2014) “Element nodes of sports equipment double back flip factions and double back flip hunched performed gymnast in floor exercise”, Pedagogics, psychology, medical-biological problems of physical training and sports, 18(7), pp. 23–30. doi: 10.6084/m9.figshare.1015381.