Oscillation criteria are obtained for solutions of forced and unforced second order neutral differential equations with positive and negative coefficients. These criteria generalize those of Manojlović, Shoukaku, Tanigawa and Yoshida (2006).
Manojlović, Jelena; Shoukaku, Yutaka; Tanigawa, Tomoyuki; and Yoshida, Norio
Oscillatory Behavior of Second Order Neutral Differential Equations with Positive and Negative Coefficients,
Applications and Applied Mathematics: An International Journal (AAM), Vol. 3,
1, Article 1.
Available at: https://digitalcommons.pvamu.edu/aam/vol3/iss1/1