1.
Žoldošová K, Matejovičová I. Finding out how the elementary school children manipulate with empirical material and how they process the obtained information. IEJEE [Internet]. 2017 Aug. 24 [cited 2026 Aug. 5];2(3):327-48. Available from: https://www.iejee.com/index.php/IEJEE/article/view/243