GARTSIDE, P. Proofs Without Words: Series 3. Pittsburgh Interdisciplinary Mathematics Review, Pittsburgh, v. 3, p. 141, 2025. DOI: 10.5195/pimr.2025.63. Disponível em: https://pimr.pitt.edu/pimr/article/view/63. Acesso em: 17 jul. 2025.