Chronowski, A., Klakla, M., Powązka, Z., & Żabowski, J. (2020). Professor Bogdan Jan Nowecki in memory. Annales Universitatis Paedagogicae Cracoviensis | Studia Ad Didacticam Mathematicae Pertinentia, 12, 261–264. https://doi.org/10.24917/20809751.12.13