Mari, and Per-Håkan Brøndbo. “Psychometric Properties of the Norwegian Version of the Five to Fifteen (5-15)”. PsykTestBarn 16, no. 1 (October 20, 2026): 1–15. Accessed October 20, 2026. https://septentrio.uit.no/index.php/psyktestbarn/article/view/8602.