1.
AUDOUX, Benjamin, BOBKOV, Vladimir and PARINI, Enea. On multiplicity of eigenvalues and symmetry of eigenfunctions of the $p$-Laplacian. Topological Methods in Nonlinear Analysis. Online. 20 January 2018. Vol. 51, no. 2, pp. 565 - 582. [Accessed 5 July 2025].