@article{WesselMarwanMeyerfeldtetal.2001,
  author    = {Niels Wessel and Norbert Marwan and Udo Meyerfeldt and Alexander Schirdewan and J{\"u}rgen Kurths},
  title     = {Recurrence quantification analysis to characterise the heart rate variability before the onset of ventricular tachycardia},
  url       = {http://link.springer.de/link/service/series/0558/bibs/2199/21990295.htm},
  year      = {2001},
}