(1)
Cihlář, J.; Eisenmann, P.; Krátká, M.; Vopĕnka, P. Cognitive Conflict As a Tool of Overcoming Obstacles in Understanding Infinity. Teach. Math. Comp. Sci. 2009, 7 (2), 279-295. https://doi.org/10.5485/TMCS.2009.0240.