BJARNADÓTTIR, Kristín; CHRISTIANSEN, Andreas; LEPIK, Madis. Arithmetic textbooks in Estonia, Iceland and Norway – similarities and differences during the nineteenth century. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 18, n. 3, p. 27–58, 2013. DOI: 10.7146/nomad.v18i3.148515. Disponível em: https://tidsskrift.dk/NOMAD/article/view/148515. Acesso em: 6 dec. 2025.