TAŞ, Emre; ORHAN, Cihan. Cesàro Means of Subsequences of Double Sequences. Sarajevo Journal of Mathematics, [S. l.], v. 15, n. 2, p. 169–179, 2020. DOI: 10.5644/SJM.15.02.03. Disponível em: https://www.sjm.anubih.ba/index.php/sjm/article/view/55. Acesso em: 26 jan. 2026.