@article{AmaralGoldbergerHavlinetal.1999,
  author    = {Amaral, Luis A. Nunes and Goldberger, Ary L. and Havlin, Shlomo and Rosenblum, Michael and Struzik, Zbigniew R. and Stanley, H. Eugene and Ivanov, Plamen Ch.},
  title     = {Multifractality in human heartbeat dynamics},
  year      = {1999},
  language  = {en}
}