Kühnis, J., Wachter, B. in Frommelt, C. (2016) „Involvement in Sports Clubs and Informal Sport Activities of Primary and Secondary School Children in Liechtenstein“, Revija za elementarno izobraževanje, 9(1/2), str. 10 f. Dostopno na: https://old.journals.um.si/index.php/education/article/view/370 (Pridobljeno: 8 november 2025).