More on oscillation of n th-order equations. Kosmala, Witold A.J. — 1995 Georgian Mathematical Journal
Solutions of the difference equation x n + 1 = x n x n - 1 - 1 . Kent, Candace M.; Kosmala, Witold; Radin, Michael A.; Stević, Stevo — 2010 Abstract and Applied Analysis
On the difference equation x n + 1 = x n x n - 2 - 1 . Kent, Candace M.; Kosmala, Witold; Stević, Stevo — 2011 Abstract and Applied Analysis
Long-term behavior of solutions of the difference equation x n + 1 = x n - 1 x n - 2 - 1 . Kent, Candace M.; Kosmala, Witold; Stević, Stevo — 2010 Abstract and Applied Analysis
Oscillation of a forced higher order equation Witold A. J. Kosmala — 1994 Annales Polonici Mathematici We state and prove two oscillation results which deal with bounded solutions of a forced higher order differential equation. One proof involves the use of a nonlinear functional.
On positive solutions of equations with two middle terms Witold A. Kosmala; William C. Bauldry — 1990 Annales Polonici Mathematici