GAYO, J.; PROBST, R. W. THE PROBLEM THAT HAS EULER FAMOUS. Ciência e Natura, [S. l.], v. 37, p. 342–355, 2015. DOI: 10.5902/2179460X12973. Disponível em: https://periodicos.ufsm.br/cienciaenatura/article/view/12973. Acesso em: 6 aug. 2024.