1.
Metsämuuronen J, Ukkola A. Rudimentary stages of the mathematical thinking and proficiency: Mathematical skills of low-performing pupils at the beginning of the first grade. LUMAT [Internet]. 2022 Jun. 30 [cited 2024 Sep. 20];10(2):56–83. Available from: https://journals-21.hulib.helsinki.fi/lumat/article/view/1632