@article{MOMA_1955__59_176968,
     author = {G.A. Dirac},
     title = {Circuits in {Critical} {Graphs.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {178--187},
     publisher = {mathdoc},
     volume = {59},
     year = {1955},
     zbl = {0065.39001},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1955__59_176968/}
}