@article{10_37236_1500,
     author = {E. Spence},
     title = {The strongly regular (40, 12, 2, 4) graphs},
     journal = {The electronic journal of combinatorics},
     year = {2000},
     volume = {7},
     doi = {10.37236/1500},
     zbl = {0940.05072},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1500/}
}