Csányi, Petra, Kata Fábián, Csaba Szabó, Zsanett Szabó, and Éva Vásárhelyi. 2016. “Number Theory Vs. Hungarian Highschool Textbooks: √2 Is Irrational”. Teaching Mathematics and Computer Science 14 (2): 139-52. https://doi.org/10.5485/TMCS.2016.0416.