Geodesic
New theorems for signless Laplacian eigenvalues
Bulletin de l'Académie serbe des sciences. Classe des sciences mathématiques et naturelles, Tome 33 (2008) no. 1.

Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

We extend our previous surveys of properties of spectra of signless Laplacians of graphs. Some new theorems for the signless Laplacian eigenvalues are given. In particular, a theorem on spectral characterization of graphs with $Q$-index not exceeding 4 is proved. The signless Laplacian eigenvalues of connected graphs on six vertices are given in Appendix. 
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     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/}
}
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D. Cvetković. New theorems for signless Laplacian eigenvalues. Bulletin de l'Académie serbe des sciences. Classe des sciences mathématiques et naturelles, Tome 33 (2008) no. 1. http://geodesic.mathdoc.fr/item/BASS_2008_33_1_a6/