MUKHERJEE, Shirsho. On minmax characterization in non-linear eigenvalue problems. Bruno Pini Mathematical Analysis Seminar, [S. l.], v. 12, n. 1, p. 81–100, 2021. DOI: 10.6092/issn.2240-2829/14186. Disponível em: https://mathematicalanalysis.unibo.it/article/view/14186. Acesso em: 13 jan. 2025.