@misc{yang2009cernet,
  author       = {杨家军},
  archivePrefix= {北京:中国教育和科研计算机网},
  title        = {开放式研究性教学模式的研究与实践},
  year         = {2009},
  urldate      = {2009-12-08},
  url          = {https://www.edu.cn},
}

@article{bonjour2009minerals,
  title     = {Minerals and vitamins in bone health:
    the potential value of dietary enhancement},
  author    = {Bonjour, Jean-Philippe and Gu{\'e}guen, L{\'e}on and Palacios,
    Cristina and Shearer, Martin J and Weaver, Connie M},
  journal   = {British journal of nutrition},
  volume    = {101},
  number    = {11},
  pages     = {1581--1596},
  year      = {2009},
}