MARKOVIČ, Roman, Peter ŽIŠKA, and Jaromír ŠIMONEK. 2021. “PHYSICAL ACTIVITY IN THE TIME OF COVID-19 PANDEMIC”. Studia Universitatis Babeş-Bolyai Educatio Artis Gymnasticae 66 (2):19-28. https://doi.org/10.24193/subbeag.66(2).13.