@misc{RueeggESvH16a,
  author = {Ulf R{\"{u}}egg and Thorsten Ehlers and Miro Sp{\"{o}}nemann and Reinhard von Hanxleden},
  title = {A Generalization of the Directed Graph Layering Problem},
  year = {2016},
  howpublished = {arXiv:1608.07809 [cs.OH]},
  archiveprefix = {arXiv},
  pdf = {gd16a.pdf},
  eprint = {1608.07809 [cs.OH]},
}