@article{Chen:2021rG,
  author = "Chen, An-Ping  and  Ma, Yan-Qing",
  title = "{Quarkonia: Theory}",
  doi = "10.22323/1.387.0020",
  journal = "PoS",
  year = 2021,
  volume = "HardProbes2020",
  pages = "020"
}