Elstad, Eyvind, Eli Lejonberg, and Knut-Andreas Christophersen. 2019. “Policy Mediated through Subject Matter Contexts: Antecedents of Subject-Bound Differences in Teachers’ Perceptions of Collaboration across Subjects”. International Journal of Learning, Teaching and Educational Research 18 (4):1-16. http://ijlter.myres.net/index.php/ijlter/article/view/571.