1. Degree theory for operators of monotone type and nonlinear elliptic equations with inequality constraints;Aizicovici;Mem. Amer. Math. Soc.,2008
2. Combined effects of concave and convex nonlinearities in some elliptic problems;Ambrosetti;J. Funct. Anal.,1994
3. The Ambrosetti-Prodi problem for the p-Laplace operator;Arcoya;Comm. Partial Differential Equations,2006
4. Bifurcation phenomena for the positive solutions of semilinear elliptic problems with mixed boundary conditions;Barletta;J. Nonlinear Convex Anal.,2016
5. On positive solutions for (p,q)-Laplace equations with two parameters;Bobkov;Calc. Var. Partial Differential Equations,2015