Kornør, Hege, and Monica Martinussen. “The Psychometric Properties of the Norwegian Version of Parenting Stress Index, 3. Version (PSI)”. PsykTestBarn 1, no. 1 (August 15, 2011): 1–9. Accessed August 26, 2026. https://septentrio.uit.no/index.php/psyktestbarn/article/view/7534.