GADD, Cora; WONG, Ka Lun. A Generalization to Bellman and Shapiro’s Method on the Sum of Digital Sum Functions. The PUMP Journal of Undergraduate Research, [S. l.], v. 5, p. 176–187, 2022. DOI: 10.46787/pump.v5i0.3485. Disponível em: https://journals.calstate.edu/pump/article/view/3485. Acesso em: 3 jul. 2024.