1. Nonoscillation Theory of Functional Differential Equations with Applications;Agarwal,2012
2. About zeros of solutions of linear differential equations of the second order with delayed argument;Azbelev;Differ. Uravn.,1971
3. Periodic solutions to reversible second order autonomous DDEs in prescribed symmetric nonconvex domains;Balanov;NoDEA Nonlinear Differ. Equ. Appl.,2021
4. Differential Difference Equations;Bellman,1963
5. Oscillation, Stability and Asymptotic Properties for Second and Higher Order Functional Differential Equations;Berezansky,2020