VAIDYA, A. M.; JOSHI, V. S. On Exponentially Ternary 2-Free Integers. The Journal of the Indian Mathematical Society, [S. l.], v. 57, n. 1-4, p. 169–177, 1991. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/21940. Acesso em: 2 may. 2024.