A remark on a nonlinear boundary value problem of the third order Ján Rusnák — 1990 Archivum Mathematicum
Method of successive approximations for a certain nonlinear third order boundary value problem Ján Rusnák — 1987 Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
Existence theorems for a certain nonlinear boundary value problem of the third order Ján Rusnák — 1987 Mathematica Slovaca
A three-point boundary value problem for third order differential equations Ján Rusnák — 1983 Mathematica Slovaca
Constructions of lower and upper solutions for a nonlinear boundary value problem of the third order and their applications Ján Rusnák — 1990 Mathematica Slovaca