@article{directionalgraphnetworks1,
  title = {Directional Graph Networks},
  author = {Dominique Beaini and Saro Passaro and Vincent Létourneau and William L. Hamilton and Gabriele Corso and Pietro Liò},
  year = {2020},
  eprint = {2010.02863},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2010.02863v4},
}