@article{SperlichMatzkaHolmberg2023,
  author    = {Billy Sperlich and Manuel Matzka and Hans-Christer Holmberg},
  title     = {The proportional distribution of training by elite endurance athletes at different intensities during different phases of the season},
  journal   = {Frontiers in Sports and Active Living},
  volume    = {5},
  doi       = {10.3389/fspor.2023.1258585},
  year      = {2023},
}