Kornør H, Heyerdahl S. The Psychometric Properties of the Norwegian version of Strengths and Difficulties Questionnaire, selvrapport (SDQ-S). PTB [Internet]. 2013 Dec. 13 [cited 2025 Apr. 18];3(2):1-14. Available from: https://new.eludamos.org/index.php/psyktestbarn/article/view/7518