CHEUNG, W.-S. DISCRETE POINCARE-TYPE INEQUALITIES. Tamkang Journal of Mathematics, [S. l.], v. 29, n. 2, p. 145–153, 1998. DOI: 10.5556/j.tkjm.29.1998.4287. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4287. Acesso em: 3 may. 2024.