On periodic solutions of differential equations with piecewise constant argument

@article{Akhmet2008OnPS,
  title={On periodic solutions of differential equations with piecewise constant argument},
  author={Marat Akhmet and C. B{\"u}y{\"u}kadali},
  journal={Computers & Mathematics with Applications},
  year={2008},
  volume={56},
  pages={2034-2042}
}