Brogstad, Gregorios Daniel Schevig. “Russian Mathematics İn Norwegian Classrooms Challenges in Implementing Zankov’s Didactic-Methodological System in Primary Mathematics Education in Norway”. International Electronic Journal of Elementary Education, vol. 17, no. 3, Apr. 2025, pp. 335-52, https://iejee.com/index.php/IEJEE/article/view/2280.