Hellwig, J. (1999). 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, (9/10), 64. https://doi.org/10.14746/bhw.1999.9.10.19