@article{PIM_1982_N_S_31_45_a24,
     author = {Aleksandar Torga\v{s}ev},
     title = {The {Spectrum} {Of} {Line} {Graphs} {Of} {Some} {Infinite} {Graphs}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {209 },
     year = {1982},
     volume = {_N_S_31},
     number = {45},
     url = {http://geodesic.mathdoc.fr/item/PIM_1982_N_S_31_45_a24/}
}