@misc{10_1017_S0008439500026291,
     title = {Note on the {Structure} of {Graphs}},
     journal = {Canadian mathematical bulletin},
     pages = {221--228},
     year = {1962},
     volume = {5},
     number = {2},
     doi = {10.1017/S0008439500026291},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0008439500026291/}
}