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- [2] Uncountably many solutions of a system of third order nonlinear differential equations COMMENTATIONES MATHEMATICAE UNIVERSITATIS CAROLINAE, 2011, 52 (03): : 369 - 389
- [9] Existence of periodic solutions for first-order totally nonlinear neutral differential equations with variable delay COMMENTATIONES MATHEMATICAE UNIVERSITATIS CAROLINAE, 2014, 55 (02): : 215 - 225