@article{Boels:2018BS,
  author = "Boels, Rutger  and  Huber, Tobias  and  Yang, Gang",
  title = "{The nonplanar cusp and collinear anomalous dimension at four loops in ${\mathcal N} = 4$ SYM theory }",
  doi = "10.22323/1.290.0042",
  journal = "PoS",
  year = 2018,
  volume = "RADCOR2017",
  pages = "042"
}