Ystrom, Eivind, Ragnhild Ørstavik, Ted Reichborn-Kjennerud, and Fartein Ask Torvik. “Social Inequalities in Reception of Social Welfare Support: A Population Based Twin Study”. Norsk Epidemiologi 26, no. 1-2 (July 20, 2016). Accessed April 20, 2024. https://www.ntnu.no/ojs/index.php/norepid/article/view/2016.