共 50 条
- [27] OSCILLATION OF EVEN ORDER SELF-ADJOINT DIFFERENTIAL OPERATORS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1973, 20 (03): : A327 - A327
- [28] SOLUTION BEHAVIOR FOR SELF-ADJOINT DIFFERENTIAL EQUATIONS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1970, 17 (01): : 146 - &
- [30] Oscillation and spectral properties of self-adjoint differential operators Nonlinear Analysis, Theory, Methods and Applications, 1997, 30 (03): : 1375 - 1384