TY - Acta mathematica scientia,Series A A1 - Ping Zhang,Jiashan Yang,Guijiang Qin T1 - Oscillation of Second-Order Nonlinear Nonautonomous Delay Dynamic Equations on Time Scales Y1 - 2022-06-26 JF - Acta mathematica scientia, Series A JO - Acta mathematica scientia,Series A SP - 839 EP - 850 VL - 42 IS - 3 UR - http://121.43.60.238/sxwlxbA N1 - ER -