Subsequences of real valued sequences and convergence. Periodicals of Engineering and Natural Sciences, [S. l.], v. 9, n. 3, p. 260–265, 2021. DOI: 10.21533/pen.v9.i3.843. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/843. Acesso em: 30 jul. 2026.