G. A. A. Afrouzi, S. Mahdavi, and Z. Naghizadeh, “The Nehari Manifold for p-Laplacian Equation with Dirichlet Boundary Condition”, NAMC, vol. 12, no. 2, pp. 143–155, Apr. 2007, doi: 10.15388/NA.2007.12.2.14705.