Author: O'Regan, Donal

O'Regan, Donal: Landesman Lazer type results for first order periodic problems. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 38 (1997), issue 2, pp. 297-308
O'Regan, Donal: Differential equations at resonance. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 36 (1995), issue 4, pp. 673-694
Lee, John W.; O'Regan, Donal: Existence results for differential equations in Banach spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 34 (1993), issue 2, pp. 239-251

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