Brandseth, Oda Lekve, Malin Torstveit Håvarstein, Helga Bjørnøy Urke, Ellen Haug, and Torill Larsen. “Mental Well-Being Among Students in Norwegian Upper Secondary Schools: The Role of Teacher Support and Class Belonging”. Norsk Epidemiologi 28, no. 1-2 (May 9, 2019). Accessed May 27, 2020. https://www.ntnu.no/ojs/index.php/norepid/article/view/3050.