Anoop, Thazhe Veetil, and Nirjan Biswas. “On Global Bifurcation for the Nonlinear Steklov Problems”. Topological Methods in Nonlinear Analysis 58, no. 2 (December 5, 2021): 731–763. Accessed July 22, 2024. https://apcz.umk.pl/TMNA/article/view/36415.