Comparison of Laplace Beltrami Operator Eigenvalues on Riemannian Manifolds. European Journal of Mathematics and Statistics, [S. l.], v. 3, n. 5, p. 56–61, 2022. DOI: 10.24018/ejmath.2022.3.5.143. Disponível em: https://ej-math.org/index.php/ejmath/article/view/143. Acesso em: 13 sep. 2025.