共 14 条
- [5] Gopalsamy K., 2013, STABILITY OSCILLATIO, V74
- [6] Gyori I., 1991, Oscillation theory of delay differential equations with applications
- [7] Hale, 1977, INTRO FUNCTIONAL DIF
- [8] Horn R.A., 2012, Matrix Analysis
- [10] Kolmanovskii V. B., 1999, Introduction to the Theory and Applications of Functional Differential Equations