Smartphones in sports and physical activities of adolescents

ADAMČÁK, Štefan - BARTIK, Pavol. Smartphones in sports and physical activities of adolescents. Rec. Jaromír Šimonek, Josef Oborný. 1. vyd. Poznaň : Wyższa Szkoła Uni Terra w Poznaniu, 2021. 111 s. ISBN 978-83-62750-31-3.