Asymptotic and oscillatory behaviour of solutions of certain second order neutral differential equations with forcing term Staněk, Svatoslav (1992) Mathematica Slovaca Similarity:
Oscillation criteria for forced neutral differential equations Said R. Grace, Bikkar S. Lalli (1994) Czechoslovak Mathematical Journal Similarity:
Oscillation theorems of comparison type for neutral nonlinear functional differential equations Said R. Grace (1995) Czechoslovak Mathematical Journal Similarity: