1. Bray, M., Adamson, B., & Mason, M. (2007). Comparative education research. Approaches and methods. Springer.
2. CSI (Czech School Inspectorate) (2021). Information from inspection activities on the qualification of teachers of primary and secondary schools. Internally processed statistical data for the purpose of the Progres study. Prepared by the Department of Educational System Evaluation. Radovan Bogdanowicz.
3. Dvořák, D., K. Starý, Urbánek, P. (2015). Škola v globální době: proměny pěti českých základních škol [School in the global age: transformations of five Czech primary schools]. Charles University in Prague, Karolinum.
4. European Commission (2019). Key Data on Early Childhood Education and Care in Europe – 2019 Edition. Eurydice Report. Publications Office of the European Union.
5. European Commission/EACEA/Eurydice (2020). Teachers’ and School Heads’ Salaries and Allowances in Europe – 2018/19. Eurydice Facts and Figures. Publications Office of the European Union.