@article{Runkel:20196L,
  author = "Runkel, Robert  and  Szőr, Zoltán  and  Vesga, Juan Pablo  and  Weinzierl, Stefan",
  title = "{A new formulation of the loop-tree duality at higher loops}",
  doi = "10.22323/1.375.0073",
  journal = "PoS",
  year = 2019,
  volume = "RADCOR2019",
  pages = "073"
}