@article{CarlsohnScharhagRosenbergerCasseletal.2011,
  author    = {Anja Carlsohn and Friederike Scharhag-Rosenberger and Michael Cassel and Josefine Weber and Annette de Guzman Guzman and Frank Mayer},
  title     = {Physical activity levels to estimate the energy requirement of adolescent athletes},
  journal   = {Pediatric exercise science},
  volume    = {23},
  number    = {2},
  pages     = {261 -- 269},
  year      = {2011},
}