@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040046,
 author = {Abou-El-Ela, A. M. A. and Sadek, A. I. and Mahmoud, A. M.},
 issue = {1},
 journal = {Journal of mathematical sciences, the University of Tokyo},
 month = {Sep},
 pages = {35--49},
 title = {Periodic Solutions for a Kind of Third-Order Delay Differential Equations with a Deviating Argument},
 volume = {18},
 year = {2011}
}