@inproceedings{str:RTA07,
  author = "Lutz Stra{\ss}burger",
  title ="A Characterisation of Medial as Rewriting Rule",
  year = 2007,
  pages= "344--358",
  booktitle="Term Rewriting and Applications, RTA'07",
  editor = "Franz Baader",
  pdf="http://www.lix.polytechnique.fr/~lutz/papers/CharMedial.pdf",
  publisher =  {Springer-Verlag},
  volume =     4533,
  series    = {Lecture Notes in Computer Science},
}