@inproceedings{Chen:2024Yt,
  author = "Chen, Hao  and  Qi, Hong-Rong",
  title = "{The Pole Counting Rule and X, Y, Z States}",
  doi = "10.22323/1.413.0056",
  booktitle = "Proceedings of The 10th International Workshop on Chiral Dynamics {\textemdash} PoS(CD2021)",
  year = 2024,
  volume = "413",
  pages = "056"
}