@article{RietschEccardScheffler2013,
  author    = {Katrin Rietsch and Jana Eccard and Christiane Scheffler},
  title     = {Decreased external skeletal robustness due to reduced physical activity?},
  url       = {http://onlinelibrary.wiley.com/doi/10.1002/ajhb.22389/pdf},
  year      = {2013},
}