WU, X.; BAI, Z. On third-order three-point right focal boundary value problems. Tamkang Journal of Mathematics, [S. l.], v. 39, n. 4, p. 317–324, 2008. DOI: 10.5556/j.tkjm.39.2008.5. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/5. Acesso em: 5 may. 2024.