@article{PIM_1978_N_S_23_37_a6,
     author = {Drago\v{s} M. Cvetkovi\'c and Slobodan K. Simi\'c},
     title = {Graphs {Which} {Are} {Switching} {Equivalent} {To} {Their} {Line} {Graphs}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {39 },
     publisher = {mathdoc},
     volume = {_N_S_23},
     number = {37},
     year = {1978},
     url = {http://geodesic.mathdoc.fr/item/PIM_1978_N_S_23_37_a6/}
}