1. 1. AKTAS, S., N. ERKMEN, F. GUVEN & H. TASKIN, 2014. Effects of the different recovery durations on some physiological parameters during 3 x 3 small-sided games in soccer. In: International Journal of Sport and Health Science.8(12), pp. 134-139. ISSN 1348-1509.
2. 2. ASCI, A., 2016. Heart rate responses during small sided games and official match-play in soccer. In: Sports.4(2), pp. 1-7. ISSN 2075-4663.10.3390/sports4020031
3. 3. BABIC, M., 2016. Vnútorné zaťaženie hráčov v rôznych prípravných hrách vo futbale. [Internal load of football players in vary of small-sided games in football]. Bratislava. Comenius University in Bratislava. Bachelor thesis. Faculty of Physical Education and Sports, Department of Sports Games.
4. 4. BABIC, M. & M. HOLIENKA, 2018. Komparácia vnútorného zaťaženia brankárov vo futbale v tréningovom procese. [A comparison of the internal load in soccer training process of goalkeepers]. In: Studia Sportiva.12(2), pp. 202-211. ISSN 2570-8783.10.5817/StS2018-2-20
5. 5. BABIC, M., M. HOLIENKA & M. MIKULIČ, 2018. Internal load of soccer goalkeepers during the improvement of selected game activities. In: Journal of Physical Education and Sport.18(3), pp. 1731-1737. ISSN 2247-8051.