KÄRKI, Tomi; MCMULLEN, Jake; LEHTINEN, Erno. Designing a game-based environment for enhancing rational number knowledge. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 26, n. 2, p. 25–46, 2021. DOI: 10.7146/nomad.v26i2.149163. Disponível em: https://tidsskrift.dk/NOMAD/article/view/149163. Acesso em: 10 feb. 2026.