@article{Wang:2012I7,
  author = "Wang, Qian  and  li, gang  and  Liu, Xiao Hai  and  Zhao, Qiang",
  title = "{The nature of X(3900) and recognition of open charm effects}",
  doi = "10.22323/1.157.0071",
  journal = "PoS",
  year = 2012,
  volume = "QNP2012",
  pages = "071"
}