Fixed point theorems for multifunctions with applications to discontinuous operator and differential equations

Carl, 2000 Carl, 2003, Fixed point theorems for multivalued operators and application to discontinuous quasilinear BVP's, Appl. Anal., 82, 1017, 10.1080/00036810310001596593 Heikkilä, 1993, On fixed points of multifunctions in ordered spaces, Appl. Anal., 51, 115, 10.1080/00036819308840206 Heikkilä, 1994 Huy, 2002, Fixed points of increasing multivalued operators and an application to discontinuous elliptic equations, Nonlinear Anal., 51, 673, 10.1016/S0362-546X(01)00850-1 Lindqvist, 1990, On the equation div(|∇u|p−2∇u)+λ|u|p−2u=0, Proc. Amer. Math. Soc., 109, 157 Schaefer, 1966 Zeidler, 1985 Zeidler, 1990