On Making Directed Graphs Transitive. Weller, M., Komusiewicz, C., Niedermeier, R., & Uhlmann, J. In WADS, volume 5664, of Lecture Notes in Computer Science, pages 542–553, 2009. Springer.
bibtex   
@inproceedings{DBLP:conf/wads/WellerKNU09,
  author       = {Mathias Weller and
                  Christian Komusiewicz and
                  Rolf Niedermeier and
                  Johannes Uhlmann},
  title        = {On Making Directed Graphs Transitive},
  booktitle    = {{WADS}},
  series       = {Lecture Notes in Computer Science},
  volume       = {5664},
  pages        = {542--553},
  publisher    = {Springer},
  year         = {2009}
}

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