@article{ELA_1999-2000__6__a0,
     author = {Friedland, Shmuel and Schneider, Hans},
     title = {Spectra of expansion graphs},
     journal = {The electronic journal of linear algebra},
     pages = {2--10},
     publisher = {mathdoc},
     volume = {6},
     year = {1999-2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_1999-2000__6__a0/}
}