@inproceedings{SemiringCirculations,
  author    = {Roland Gl{\"{u}}ck and
               Bernhard M{\"{o}}ller},
  title     = {Circulations, Fuzzy Relations and Semirings},
  booktitle = {Mathematics of Program Construction, 9th International Conference,
               {MPC} 2008, Marseille, France, July 15-18, 2008. Proceedings},
  pages     = {134--152},
  year      = {2008},
  editor    = {Philippe Audebaud and
               Christine Paulin{-}Mohring},
  series    = {Lecture Notes in Computer Science},
  volume    = {5133},
  publisher = {Springer},
  url       = {http://dx.doi.org/10.1007/978-3-540-70594-9_9},
  doi       = {10.1007/978-3-540-70594-9_9},
}