Heine, Eduard. “Elementy Teorii Funkcji”. Annales Universitatis Paedagogicae Cracoviensis | Studia ad Didacticam Mathematicae Pertinentia 6 (July 5, 2017): 153–166. Accessed November 21, 2024. https://didacticammath.uken.krakow.pl/article/view/3655.