@article{ITA_2006__40_2_227_0,
     author = {Boldi, Paolo and Lonati, Violetta and Santini, Massimo and Vigna, Sebastiano},
     title = {Graph fibrations, graph isomorphism, and pagerank},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {227--253},
     publisher = {EDP-Sciences},
     volume = {40},
     number = {2},
     year = {2006},
     doi = {10.1051/ita:2006004},
     mrnumber = {2252637},
     zbl = {1112.68002},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ita:2006004/}
}