PAPAGEORGIOU, Nikolaos S., RĂDULESCU, Vicenţiu D. and REPOVŠ, Dušan D. Global multiplicity for parametric anisotropic Neumann (p,q)-equations. Topological Methods in Nonlinear Analysis. Online. 26 February 2023. Vol. 61, no. 1, pp. 393 - 422. [Accessed 24 August 2024]. DOI 10.12775/TMNA.2022.010.