共 9 条
- [1] [Anonymous], 1961, Pac. J. Math, DOI DOI 10.2140/PJM.1961.11.919
- [3] EASTHAM MSP, 1989, ASYMPTOTIC SOLUTION, V4
- [7] Leighton W., 1952, J. Lond. Math. Soc., Vs1-27, P37, DOI [10.1112/jlms/s1-27.1.37, DOI 10.1112/JLMS/S1-27.1.37]
- [9] Swanson C.A, 1968, Comparison and Oscillation Theory of Linear Differential Equations