@article{Zhang:2016E1,
  author = "Zhang, Yu",
  title = "{Lowering the ARGO-YBJ energy threshold to a few tens of GeV by using the double front shower events }",
  doi = "10.22323/1.236.0720",
  journal = "PoS",
  year = 2016,
  volume = "ICRC2015",
  pages = "720"
}