Szwarc, Andrzej, Christoph Kromke, Aleksander Stuła, Bartosz Dolański, and Mateusz Sitek. 2020. “Efficiency of One-on-One Play Situations of Polish Football Players and Their Opponents During European Championships in Relation to the Playing Area, Current Result and Match”. Physical Education of Students 24 (3):174-85. https://doi.org/10.15561/20755279.2020.0308.