@article{KemmlerStengelKohl2017,
  author    = {Kemmler, Wolfgang and Stengel, Simon von and Kohl, Matthias},
  title     = {Exercise Frequency and Fracture Risk in Older Adults—How Often Is Enough?},
  journal   = {Current Osteoporosis Reports},
  volume    = {15.2017},
  number    = {6},
  issn      = {1544-1873},
  doi       = {10.1007/s11914-017-0407-7},
  pages     = {564 -- 570},
  year      = {2017},
  language  = {en}
}