@article{PIM_1983_N_S_34_48_a5,
     author = {Drago\v{s} Cvetkovi\'c},
     title = {Spectral {Characterizations} of {Line} {Graphs.} {Variations} on the {Theme}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {31 },
     publisher = {mathdoc},
     volume = {_N_S_34},
     number = {48},
     year = {1983},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1983_N_S_34_48_a5/}
}