KUCZMA, Marek. On measurable functions with vanishing differences. Annales Mathematicae Silesianae, [S. l.], v. 6, p. 42–60, 1992. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14266. Acesso em: 7 may. 2025.