Zsófia Gabriella Szabó, Erzsébet Korom (2017): Developing combinatorial reasoning among third grade pupils. In: Education in the Crossroads of Economy and Politics: Role of Research in the Advancement of Public Good: 17th Biennial EARLI Conference for Research on Learning and Instruction. Tampere, Finland, August 27th–September 2nd, 2017. pp. 448–449.