Beťák, Boris, and Stanislav Azor. “Sports Activities of Secondary School Students in Zvolen During Their Free Time”. Acta Salus Vitae 1, no. 2 (March 20, 2013). Accessed June 12, 2026. https://odbornecasopisy.palestra.cz/index.php/actasalusvitae/article/view/20.