BARCZ, Eugeniusz. On the two-dimensional version of the Sperner Lemma and Brouwer’s theorem. Annales Mathematicae Silesianae, [S. l.], v. 36, n. 2, p. 106–114, 2022. Disponível em: https://journals.us.edu.pl/index.php/AMSIL/article/view/14550. Acesso em: 5 dec. 2025.