中国科学院数学与系统科学研究院期刊网
AMS
Oscillation Theorems for Second-Order Nonlinear Neutral Delay Dynamic Equations on Time Scales
Samir H. SAKER, Donal O'REGAN, Ravi P. AGARWAL
Acta Mathematica Sinica . 2008, (9): 1409 -1432 .  DOI: 10.1007/s10114-008-7090-7