Volterra and Urysohn integral equations in Banach spaces.
Nonnegative solutions to superlinear problems of generalized Gelfand type.
Existence principles for second order nonresonant boundary value problems.
Multivalued -essential maps of acyclic type on Hausdorff topological spaces.
A note on multivalued differential equations on proximate retracts.
Fixed point theory on extension-type spaces and essential maps on topological spaces.
Essential -type maps and Birkhoff–Kellogg theorems.
Singular and nonsingular boundary value problems with sign changing nonlinearities.
Existence criteria for integral equations in Banach spaces.
Construction of upper and lower solutions for singular discrete initial and boundary value problems via inequality theory.
Existence and multiplicity of solutions for some three-point nonlinear boundary value problems.
Multiplicity results using bifurcation techniques for a class of fourth-order -point boundary value problems.
Lidstone continuous and discrete boundary value problems.
Birkhoff-Kellogg theorems on invariant directions for multimaps.
Nonlinear essential maps of Mönch, 1-set contractive demicopmact and monotone type.
A fixed point theorem of Leggett-Williams type with applications to single- and multivalued equations.
Fixed point theory for admissible type maps with applications.
Fixed points of cone compression and expansion multimaps defined on Fréchet spaces: the projective limit approach.
A dual of the compression-expansion fixed point theorems.
Leray-Schauder results for multivalued nonlinear contractions defined on closed subsets of a Fréchet space.
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