Heradstveit, O., Nilsen, S. A., Breivik, K., Bakken, A., Haug, T., Hartveit, K., & Stormark, K. M. (2021). Past Year Cannabis Use Among Norwegian Adolescents: Time Trends Based on the Ungdata Surveys 2010–2019. Front Psychiatry.

Heradstveit, Ove, Sondre Aasen Nilsen, Kyrre Breivik, Anders Bakken, Thomas Haug, Kristian Hartveit, and Kjell Morten Stormark. "Past Year Cannabis Use Among Norwegian Adolescents: Time Trends Based On the Ungdata Surveys 2010–2019." Front Psychiatry 2021.

Heradstveit, Ove, et al. "Past Year Cannabis Use Among Norwegian Adolescents: Time Trends Based On the Ungdata Surveys 2010–2019." Front Psychiatry 2021.