Role of smartphones in increasing physical activity in secondary school students

ADAMČÁK, Štefan - BARTIK, Pavol - MARKO, Michal. Role of smartphones in increasing physical activity in secondary school students. In Xmas Conference. online vedecká konferencia. THE SKY - International Journal of Physical Education and Sports Sciences. - Pandžáb : The University of Lahore, 2021. ISSN 2523-9368, 2021, special issue, pp. 1-10. Dostupné na internete: <https://sites2.uol.edu.pk/journals/the-sky/issue/view/120>