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- [23] NONOSCILLATION CRITERIA FOR SECOND ORDER DIFFERENTIAL EQUATIONS WITH RETARDED ARGUMENT NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1970, 17 (01): : 145 - &
- [29] Periodic solutions of retarded functional differential equations Zeitschrift für angewandte Mathematik und Physik ZAMP, 2001, 52 : 704 - 712