ARNDT, S.; PHAM, R. Beach Math Problems and Solutions. Pittsburgh Interdisciplinary Mathematics Review, Pittsburgh, v. 1, p. 128–142, 2024. DOI: 10.5195/pimr.2024.26. Disponível em: https://pimr.pitt.edu/pimr/article/view/26. Acesso em: 18 jan. 2025.