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- [7] The criterion of nonoscillation for a differential equation of second order DYNAMICS OF CONTINUOUS DISCRETE AND IMPULSIVE SYSTEMS-SERIES A-MATHEMATICAL ANALYSIS, 2006, 13 : 145 - 149
- [8] Oscillation criteria for second order impulsive delay differential equation GLOBAL ANALYSIS AND APPLIED MATHEMATICS, 2004, 729 : 317 - 324