Djibaoui M, Moussaoui T. Variational methods to second-order Dirichlet boundary value problems with impulses on the half-line. CUBO [Internet]. 2022 Aug. 22 [cited 2025 Dec. 7];24(2):227–237. Available from: https://cubo.ufro.cl/index.php/cubo/article/view/3096