Da-Xue Chen and Guang-Hui Liu, Oscillation Criteria for Nonlinear Second-order Damped Delay Dynamic Equations on Time Scales. journal = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology. January 2010, vol. 37(1). 185 - 192 [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/10351.