Djebali, Smaïl, and Ouiza Saifi. “Upper and Lower Solutions for φ−Laplacian Third-Order BVPs on the Half-Line”. CUBO, A Mathematical Journal 16, no. 1 (March 1, 2014): 105–116. Accessed May 18, 2024. https://cubo.ufro.cl/ojs/index.php/cubo/article/view/1292.