PEHKONEN, Erkki; TÖRNER, Günter. Methodological considerations on investigating teachers’ beliefs of mathematics and its teaching. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 9, n. 1, p. 21–50, 2004. DOI: 10.7146/nomad.v9i1.147060. Disponível em: https://tidsskrift.dk/NOMAD/article/view/147060. Acesso em: 6 dec. 2025.