Ciosek, M., & Sajka, M. (2024). Anna Sierpinska (1947-2023) - Outstanding Researcher in Mathematics Education. Annales Universitatis Paedagogicae Cracoviensis | Studia Ad Didacticam Mathematicae Pertinentia, 16, 117–134. https://doi.org/10.24917/20809751.16.8