@article{ITA_1982__16_3_263_0,
     author = {Mahr, Bernd},
     title = {Algebraic complexity of path problems},
     journal = {RAIRO. Informatique th\'eorique},
     pages = {263--292},
     publisher = {EDP-Sciences},
     volume = {16},
     number = {3},
     year = {1982},
     mrnumber = {686917},
     zbl = {0504.68023},
     language = {en},
     url = {http://archive.numdam.org/item/ITA_1982__16_3_263_0/}
}