1. J. Benedikt, P. Girg, L. Kotrla, P. Takac, Origin of the p-Laplacian and A. Missbach, Electron. J. Differential Equations 2018 (16) 1–17.
2. On multiplicity of eigenvalues and symmetry of eigenfunctions of the p-Laplacian;Audoux;Topol. Methods Nonlinear Anal.,2018
3. P. Lindqvist, A nonlinear eigenvalue problem, in: Lecture Notes, http://www.math.ntnu.no/lindqvist.
4. On the equation div(|∇u|p−2∇u)+λ|u|p−2u=0;Lindqvist;Proc. Amer. Math. Soc,1990
5. Quasilinear Elliptic Equations with Degenerations and Singularities;Drábek,1997