Ádám, Zsolt, Károly Lajkó, Gyula Maksa, and Fruzsina Mészáros. “Sequenced Problems for Functional Equations”. Teaching Mathematics and Computer Science 4, no. 1 (June 1, 2006): 179–192. Accessed November 24, 2024. https://ojs.lib.unideb.hu/tmcs/article/view/14767.