@article{Gerhardt:2016we,
  author = "Gerhardt, Michael  and  Ayala Solares, Hugo  and  Hui, C. Michelle  and  Lauer, Robert  and  Ren, Zhixiang  and  Salesa Greus, Francisco  and  Zhou, Hao",
  title = "{The Calibration System of the HAWC Gamma-Ray Observatory }",
  doi = "10.22323/1.236.0997",
  journal = "PoS",
  year = 2016,
  volume = "ICRC2015",
  pages = "997"
}