1.
Novotná J, Eisenmann P, Přibyl J, Ondrušová J, Břehovský J. PROBLEM SOLVING IN SCHOOL MATHEMATICS BASED ON HEURISTIC STRATEGIES. ERIES Journal [Internet]. 2014Mar.31 [cited 2019Aug.26];7(1):1-. Available from: https://www.eriesjournal.com/index.php/eries/article/view/96