Colorado, E., & Peral, I. (2004). Eigenvalues and bifurcation for elliptic equations with mixed Dirichlet-Neumann boundary conditions related to Caffarelli-Kohn-Nirenberg inequalities. Topological Methods in Nonlinear Analysis, 23(2), 239–273. Retrieved from https://apcz.umk.pl/TMNA/article/view/TMNA.2004.011