Jarczyk, Witold. “Existence and Uniqueness of Continuous Solutions of Nonlinear Functional Equations Are Generic Properties”. Annales Mathematicae Silesianae 3 (January 30, 1990): 32–40. Accessed May 6, 2025. https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14299.