@article{Piskorski:2005,
  author  = "J. Piskorski and P. Guzik",
  title   = "Filtering Poincare plots",
  journal = "Computational Methods in Science and Technology",
  volume  = "Vol. 11",
  number  = "no 1",
  pages   = "39--48",
  year    = "2005",
}