@article{10_4153_CMB_1962_021_8,
     author = {Dirac, G.A.},
     title = {Note on the {Structure} of {Graphs}},
     journal = {Canadian mathematical bulletin},
     pages = {221--227},
     year = {1962},
     volume = {5},
     number = {3},
     doi = {10.4153/CMB-1962-021-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1962-021-8/}
}