@article{ELA_2002__9__a7,
     author = {F\"orster, K.-H. and Nagy, B.},
     title = {On spectra of expansion graphs and matrix polynomials. {II}},
     journal = {The electronic journal of linear algebra},
     pages = {158--170},
     publisher = {mathdoc},
     volume = {9},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2002__9__a7/}
}