@article{ITA_2009__43_3_567_0,
     author = {Bradford, Phillip G. and Thomas, David A.},
     title = {Labeled shortest paths in digraphs with negative and positive edge weights},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {567--583},
     publisher = {EDP-Sciences},
     volume = {43},
     number = {3},
     year = {2009},
     doi = {10.1051/ita/2009011},
     mrnumber = {2541131},
     zbl = {1175.68196},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ita/2009011/}
}