@article{BASS_2008_33_1_a6,
     author = {D. Cvetkovi\'c},
     title = {New theorems for signless {Laplacian} eigenvalues},
     journal = {Bulletin de l'Acad\'emie serbe des sciences. Classe des sciences math\'ematiques et naturelles},
     pages = {131 - 146},
     publisher = {mathdoc},
     volume = {33},
     number = {1},
     year = {2008},
     zbl = {1199.05212},
     url = {http://geodesic.mathdoc.fr/item/BASS_2008_33_1_a6/}
}