How to Sort by Walking on a Tree. Graf, D. In Bansal, N. & Finocchi, I., editors, Algorithms - ESA 2015, volume 9294, of Lecture Notes in Computer Science, pages 643–655, Heidelberg, 2015. Springer.
bibtex   
@INPROCEEDINGS{Graf2015IP,
  author = {Graf, Daniel},
  title = {{H}ow to {S}ort by {W}alking on a {T}ree},
  booktitle = {Algorithms - ESA 2015},
  year = {2015},
  editor = {Bansal, Nikhil and Finocchi, Irene},
  volume = {9294},
  series = {Lecture Notes in Computer Science},
  pages = {643--655},
  address = {Heidelberg},
  publisher = {Springer}
}

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