@inproceedings{Ji:20189I,
  author = "Ji, Chueng-Ryong  and  Bakker, Bernard L. G.",
  title = "{Conceptual Issues of GPDs}",
  doi = "10.22323/1.308.0038",
  booktitle = "Proceedings of QCD Evolution 2017 {\textemdash} PoS(QCDEV2017)",
  year = 2018,
  volume = "308",
  pages = "038"
}