@article{GronwaldHoos2020,
  author    = {Thomas Gronwald and Olaf Hoos},
  title     = {Correlation properties of heart rate variability during endurance exercise: A systematic review},
  journal   = {Annals of Noninvasive Electrocardiology},
  volume    = {25},
  number    = {1},
  doi       = {10.1111/anec.12697},
  year      = {2020},
}