Papageorgiou, Nikolaos S., Vicentiu D. Radulescu, and Dusan D. Repovs. 2018. “Resonant Robin Problems Driven by the P-Laplacian Plus an Indefinite Potential”.
Annales Fennici Mathematici
43 (1):483-508. https://doi.org/10.5186/aasfm.2018.4331.