1. On the oscillation and asymptotic behavior of solutions of functional-differential equations of the first order;Ivanov;Ukrain. Mat. Z.,1981
2. Oscillations of first order nonlinear differential equations with deviating arguments;Kitamura,1980
3. On Oscillatory Properties of Differential Equations with Deviating Arguments;Koplatadze,1977
4. On even order functional differential equations with advanced and retarded arguments;Kusano;J. Differential Equations,1982
5. Oscillations of higher-order retarded differential equations generated by the retarded argument;Ladas,1972