On the asymptotic behaviour of the solutions of an n-th order difference equation J. Popenda — 1984 Annales Polonici Mathematici
On the asymptotic behaviour of solutions of difference equations J. Popenda — 1988 Annales Polonici Mathematici
Finite difference inequalities J. Popenda — 1986 Commentationes Mathematicae The article contains no abstract
On the asymptotic behaviour of the solutions of difference equations of second order J. Popenda; J. Werbowski — 1980 Commentationes Mathematicae The article contains no abstract
Nonoscillatory solutions of third order difference equations Popenda, J.; Schmeidel, E. — 1992 Portugaliae mathematica