Hukkelberg S, Torsheim T. Systematic review and classification of: The Incredible Years (IY): Parenting Program for Preschool Children (3-6 years) and School Children (6-12 years) (2. ed.). ungsinn [Internet]. 2020 Nov. 2 [cited 2025 Apr. 18];12(2). Available from: https://septentrio.uit.no/index.php/ungsinn/article/view/7573