Aunio, Pirjo, Riikka Mononen, Anu Laine, Geerdina van der Aalsvoort, Carla Compagnie, Annemie Desoete, Evelyn Kroesbergen, et al. “Mathematical Learning Difficulties – Snapshots of Current European Research”. LUMAT: International Journal on Math, Science and Technology Education 3, no. 5 (September 30, 2015): 647–674. Accessed December 10, 2024. https://journals.helsinki.fi/lumat/article/view/1011.