HIMMEL, Martin. Complementary results to Heuvers’s characterization of logarithmic functions. Annales Mathematicae Silesianae, [S. l.], v. 31, p. 99–106, 2017. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/13942. Acesso em: 7 may. 2025.