Papageorgiou, N.S. och Radulescu, V.D. 2015. Positive solutions for perturbations of the eigenvalue problem for the Robin p-Laplacian. Annales Fennici Mathematici. 40, 1 (feb. 2015), 255–277. DOI:https://doi.org/10.5186/aasfm.2015.4011.