KALISKÝ, Ján. Teachers’ understanding of critical thinking definition. In CARMO, Mafalda. Education and new developments 2022. Vol. 1. 1. vyd. - Lisabon : inScience Press, 2022. ISBN 978-989-53614-3-4. ISSN 2184-044X, pp. 214-217. Available on Internet: <http://end-educationconference.org/wp-content/uploads/2022/06/Education-and-New-Developments_2022_Vol_I.pdf>