KÜHNIS, Jürgen; WACHTER, Beat; FROMMELT, Christian. Involvement in Sports Clubs and Informal Sport Activities of Primary and Secondary School Children in Liechtenstein. Revija za elementarno izobraževanje, [S. l.], v. 9, n. 1/2, p. 10 f., 2016. Disponível em: https://old.journals.um.si/index.php/education/article/view/370. Acesso em: 8 nov. 2025.