Ohtonen Piuva, Aida, Elin Mårtensson, Ann-Sofi Röj-Lindberg, and Mats Braskén. “Finnish Pre-Service Teachers’ Basic Mathematical Skills : A Comparison Between 2008 and 2020”. FMSERA Journal (November 28, 2023). Accessed September 18, 2024. https://journal.fi/fmsera/article/view/127787.