PHAM, R.; TROSTEN, R. Beach Math: Problems to do in Ibiza, Spain. Pittsburgh Interdisciplinary Mathematics Review, Pittsburgh, v. 3, p. 129–140, 2025. DOI: 10.5195/pimr.2025.61. Disponível em: https://pimr.pitt.edu/pimr/article/view/61. Acesso em: 18 jul. 2025.