@article{jones_1998, 
  title={Bone Mass in Prepubertal Children: Gender Differences and the Role of Physical Activity and Sunlight Exposure}, 
  volume={83}, 
  DOI={10.1210/jc.83.12.4274}, 
  number={12}, 
  publisher={The Endocrine Society}, 
  author={Jones}, 
  year={1998}, 
  month={Dec}
  }