CARVALHO, Marcos Leandro, IL’YASOV, Yavdat and SANTOS, Carlos Alberto. Separating solutions of nonlinear problems using nonlinear generalized Rayleigh quotients. Topological Methods in Nonlinear Analysis. Online. 2 December 2021. Vol. 58, no. 2, pp. 453 - 480. [Accessed 16 February 2026]. DOI 10.12775/TMNA.2020.075.