@inproceedings{Chen:20220H,
  author = "Chen, Long",
  title = "{Renormalization of the flavor-singlet axial-vector current and its anomaly at $N^3LO$ in QCD}",
  doi = "10.22323/1.398.0413",
  booktitle = "Proceedings of The European Physical Society Conference on High Energy Physics {\textemdash} PoS(EPS-HEP2021)",
  year = 2022,
  volume = "398",
  pages = "413"
}