@article{1183526343, author = {Robertson, Neil}, title = {The smallest graph of girth 5 and valency 4}, journal = {Bull. Amer. Math. Soc.}, volume = {70}, number = {6}, year = {1964}, pages = { 824-825}, language = {en}, url = {http://dml.mathdoc.fr/item/1183526343} }
Robertson, Neil. The smallest graph of girth 5 and valency 4. Bull. Amer. Math. Soc., Tome 70 (1964) no. 6, pp. 824-825. http://gdmltest.u-ga.fr/item/1183526343/