TROCHANOWSKI, W. The efficiency of mathematics teaching and integrated instruction at the primary level. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 3, p. 293–298, 2003. Disponível em: https://studmath.uken.krakow.pl/article/view/13503. Acesso em: 30 oct. 2026.