TEAM, S. Smith Multiples of a Class of Primes with Small Digital Sum: Amin Witno. Thai Journal of Mathematics, [S. l.], v. 14, n. 2, p. 491–495, 2016. Disponível em: https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/612. Acesso em: 18 may. 2024.