Errata: Some records on second order differential equations Tadeusz Dłotko — 1996 Acta Mathematica et Informatica Universitatis Ostraviensis
Some records on second order differential equations Tadeusz Dłotko — 1995 Acta Mathematica et Informatica Universitatis Ostraviensis
Periodic solutions of some second order differential systems Tadeusz Dłotko — 1993 Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica