@article{Guzik:2005,
  author  = "P. Guzik and B. Bychowiec and J. Piskorski and A. Węgrzynowski and T. Krauze and R. Schneider and P. Liszkowski and A. Wykrętowicz and B. Wierusz-Wysocka and H. Wysocki",
  title   = "Heart rate variability by Poincare plot and spectral analysis in young healthy subjects and patients with type 1 diabetes",
  journal = "Folia Cardiologica",
  volume  = "T. 12",
  number  = "supl. D",
  pages   = "64--67",
  year    = "2005",
  note    = "www.fc.viamedica.pl",
}