@inproceedings{Smirnov:2016AX,
  author = "Smirnov, Vladimir  and  Henn, Johannes M.  and  Smirnov, Alexander  and  Steinhauser, Matthias",
  title = "{A planar four-loop form factor in QCD}",
  doi = "10.22323/1.260.0036",
  booktitle = "Proceedings of Loops and Legs in Quantum Field Theory {\textemdash} PoS(LL2016)",
  year = 2016,
  volume = "260",
  pages = "036"
}