Hästö, Peter, and Riikka Palkki. “Finnish students’ Flexibility and Its Relation to Speed and Accuracy in Equation Solving”. NOMAD Nordic Studies in Mathematics Education 24, no. 3-4 (November 1, 2019): 43–58. Accessed January 7, 2025. https://tidsskrift.dk/NOMAD/article/view/149023.