Symmetry during the take-off phase of countermovement jump in fencers - Iwanska, Dagmara; Tabor, Piotr; Polak, Ewa; Karczewska, Magdalena; Madej, Anna; Mastalerz, Andrzej; Urbanik, Czeslaw (Revista de Artes Marciales Asiáticas, 2016)