@article{GDZPPN002471582, title = {Circuits in Critical Graphs.}, journal = {Monatshefte f\"ur Mathematik}, volume = {59}, year = {1955}, pages = {178-187}, zbl = {0065.39001}, url = {http://dml.mathdoc.fr/item/GDZPPN002471582} }
Dirac, G.A. Circuits in Critical Graphs.. Monatshefte für Mathematik, Tome 59 (1955) pp. 178-187. http://gdmltest.u-ga.fr/item/GDZPPN002471582/