@article{Guzik:2005,
  author  = "P. Guzik and J. Piskorski and T. Krauze and R. Schneider and K. Wesseling and A. Wykrętowicz and H. Wysocki",
  title   = "The influence of changing respiratory rate on HRV is portrayed by descriptors of Poincare plot analysis",
  journal = "Folia Cardiologica",
  volume  = "T. 12",
  number  = "supl. D",
  pages   = "17--20",
  year    = "2005",
  note    = "www.fc.viamedica.pl",
}