LIN, C.-W. On the multiplicity of the eigenvalues of the vectorial Sturm-Liouville equation. Tamkang Journal of Mathematics, [S. l.], v. 42, n. 3, p. 265–274, 2011. DOI: 10.5556/j.tkjm.42.2011.764. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/764. Acesso em: 7 may. 2024.