@article{Żurek:2012,
  author  = "S. Żurek and P. Guzik and S. Pawlak and M. Kośmider and J. Piskorski",
  title   = "On the relation between correlation dimension, approximate entropy and sample entropy parameters, and a fast algorithm for their calculation",
  journal = "Physica A",
  volume  = "Vol. 391",
  number  = "no 24",
  pages   = "6601--6610",
  year    = "2012",
}