Pogonowski, Jerzy. “Podręcznik Algebry. Wprowadzenie”. Annales Universitatis Paedagogicae Cracoviensis | Studia ad Didacticam Mathematicae Pertinentia 7 (July 4, 2017): 141–154. Accessed May 11, 2024. https://didacticammath.uken.krakow.pl/article/view/3623.