@article{ Zhao16,
  author = {K. Zhao and X. Zhao and J. Deng},
  title = {An Empirical Investigation of Online Gray Markets},
  journal = {Journal of Retailing},
  volume = {92},
  number = {4},
  pages = {397-410},
  month = {December},
  year = {2016}, 
  doi = {10.1016/j.jretai.2016.05.002}
 }