@article{RaabWesselSchirdewanetal.2006,
  author    = {Corinna Raab and Niels Wessel and Alexander Schirdewan and J{\"u}rgen Kurths},
  title     = {Large-scale dimension densities for heart rate variability analysis},
  doi       = {10.1103/Physreve.73.041907},
  url       = {http://pre.aps.org/},
  year      = {2006},
}