Ujháziová, Renáta, Ján Kopka, Dušan Šveda, and Leonard Frobisher. “The Project Method and Investigation in School Mathematics”. Teaching Mathematics and Computer Science 3, no. 2 (December 1, 2005): 241–255. Accessed November 21, 2024. https://ojs.lib.unideb.hu/tmcs/article/view/14750.