On the structure of the set of solutions of nonlinear boundary value problems for ODEs on unbounded intervals Mária Kečkemétyová — 2006 Mathematica Slovaca
On the existence of a solution for nonlinear operator equations in Fréchet spaces Mária Kečkemétyová — 1992 Mathematica Slovaca
Continuous solutions of nonlinear boundary value problems for ODE's on unbounded intervals Mária Kečkemétyová — 1992 Mathematica Slovaca