@article{HeitkampSchulzRoeckeretal.1998,
  author    = {Hans-Christian Heitkamp and H. Schulz and Kai Roecker and Hans-Hermann Dickhuth},
  title     = {Endurance Training in Females: Changes in β-Endorphin and ACTH},
  series   = {International Journal of Sports Medicine},
  volume    = {19.1998},
  number    = {4},
  issn      = {1439-3964},
  doi       = {10.1055/s-2007-971915},
  pages     = {260 -- 264},
  year      = {1998},
  language  = {en}
}