1. Oscillation Theory for Neutral Differential Equations with Delay;Bainov,1991
2. Oscillations of neutral equations with variable coefficients;Chuanxi;Rad. Mat.,1989
3. Stability and Oscillations in Delay Differential Equations of Population Dynamics;Gopalsamy,1992
4. Oscillation Theory for Delay Differential Equations with Applications;Gyori,1991
5. S. Hadžiomerspahić, M. R. S. Kulenović, Existence of nonoscillatory solution for linear neutral delay equation