C. L. Mallows, N. J. A. Sloane (1975). „Two-graphs, switching classes and Euler graphs are equal in number”. SIAM Journal on Applied Mathematics. 28 (4): 876—880. JSTOR2100368. doi:10.1137/0128070.
C. L. Mallows, N. J. A. Sloane (1975). „Two-graphs, switching classes and Euler graphs are equal in number”. SIAM Journal on Applied Mathematics. 28 (4): 876—880. JSTOR2100368. doi:10.1137/0128070.