RHOADES, B. E.; SAVAS, E. A summability type factor theorem. Tamkang Journal of Mathematics, [S. l.], v. 34, n. 4, p. 395–401, 2003. DOI: 10.5556/j.tkjm.34.2003.242. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/242. Acesso em: 24 apr. 2024.