Quoirin, H. R. and Umezu, K. (2017) “An indefinite concave-convex equation under a Neumann boundary condition II”, Topological Methods in Nonlinear Analysis, 49(2), pp. 739–756. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.2017.007 (Accessed: 16 April 2024).