Bifurcation for the solutions of equations involving set valued mappings. Tarafdar, E.U., Thompson, H.B. (1985) International Journal of Mathematics and Mathematical Sciences
Boundary value problems for linear operators in ordered Banach spaces Gerd Herzog, Christoph Schmoeger (2010) Studia Mathematica We study boundary value problems of the type Ax = r, φ(x) = φ(b) (φ ∈ M ⊆ E*) in ordered Banach spaces.