@article{PORMA_1991__48_3_115760,
     author = {Merris, Russell},
     title = {The number of eigenvalues greater than two in the {Laplacian} spectrum of a graph},
     journal = {Portugaliae mathematica},
     pages = {345--349},
     publisher = {mathdoc},
     volume = {48},
     number = {3},
     year = {1991},
     mrnumber = {1127131},
     zbl = {0731.05037},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1991__48_3_115760/}
}