EBANKS, Brice. A Pexiderized cosine functional equation. Annales Mathematicae Silesianae, [S. l.], v. 40, n. 2, p. 164–173, 2026. Disponível em: https://journals.us.edu.pl/index.php/AMSIL/article/view/23716. Acesso em: 15 aug. 2026.