Q. Yang, “Interval Oscillation Criteria for a Forced Second Order Nonlinear Ordinary Differential Equations with Oscillatory Potential,” Applied Mathematics and Computation, Vol. 135, No. 1, 2003, pp. 49-64.

has been cited by the following article:

• TITLE: New Oscillation Results for Forced Second Order Differential Equations with Mixed Nonlinearities

  AUTHORS: Ercan Tunç, Adil Kaymaz

  KEYWORDS: Generalized Variational Principle; Variational Principle; Second Order Differential Equations; Riccati Transformation; Oscillation

  JOURNAL NAME: Applied Mathematics, Vol.3 No.2, February 23, 2012

  ABSTRACT: Some new oscillation criteria are given for forced second order differential equations with mixed nonlinearities by using the generalized variational principle and Riccati technique. Our results generalize and extend some known oscillation results in the literature.