@inproceedings{Behring:2022vt,
  author = "Behring, Arnd",
  title = "{Zero-jettiness beam functions at N$^3$LO}",
  doi = "10.22323/1.416.0027",
  booktitle = "Proceedings of Loops and Legs in Quantum Field Theory {\textemdash} PoS(LL2022)",
  year = 2022,
  volume = "416",
  pages = "027"
}