@inproceedings{Liu:2012RM,
  author = "Liu, Chuan  and  Chen, Ying",
  title = "{Radiative transitions in charmonium from $N_f=2$ twisted mass lattice QCD}",
  doi = "10.22323/1.139.0163",
  booktitle = "Proceedings of XXIX International Symposium on Lattice Field Theory  {\textemdash} PoS(Lattice 2011)",
  year = 2012,
  volume = "139",
  pages = "163"
}