Benevieri P, Calamai A, Furi M, Pera MP. The Brouwer degree associated to classical eigenvalue problems and applications to nonlinear spectral theory. TMNA [Internet]. 2021 Dec. 13 [cited 2025 Jun. 28];59(2A):499-523. Available from: https://apcz.umk.pl/TMNA/article/view/36492