1. Theory of Functional Differential Equations;Hale,1977
2. A new approach in the study of oscillatory behavior of even-order neutral delay diferential equations;Agarwal;Appl. Math. Comput.,2013
3. Oscillation Theory for Difference and Functional Differential Equations;Agarwal,2000
4. Oscillation Theory of Delay Differential and Difference Equations: Second and Third Orders;Saker,2010
5. Oscillation of second-order nonlinear noncanonical differential equations with deviating argument