@article{ELA_2011__22__a34,
     author = {Rojo, Oscar and Robbiano, Maria and Cardoso, Domingos M. and Martins, Enide A.},
     title = {Spectra of weighted rooted graphs having prescribed subgraphs at some levels},
     journal = {The electronic journal of linear algebra},
     pages = {653--671},
     publisher = {mathdoc},
     volume = {22},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2011__22__a34/}
}