HELLWIG, Jan. Educational Research and Higher Education Reform in Eastern and Central Europa. Red. Erich Leitner. Frankfurt a/M., Berlin, Bern, New York, Paris, Wien 1998, ss. 231, fot. 3, tab. 9. Biuletyn Historii Wychowania, [S. l.], n. 9/10, p. 64, 1999. DOI: 10.14746/bhw.1999.9.10.19. Disponível em: https://pressto.amu.edu.pl/index.php/bhw/article/view/16989. Acesso em: 27 lip. 2024.