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@article{MAN_1969__183_161895, author = {E.M. WRIGHT}, title = {The {Number} of {Graphs} on {Many} {Unlabelled} {Nodes.}}, journal = {Mathematische Annalen}, pages = {250--253}, publisher = {mathdoc}, volume = {183}, year = {1969}, zbl = {0174.26701}, url = {http://geodesic.mathdoc.fr/item/MAN_1969__183_161895/} }
E.M. WRIGHT. The Number of Graphs on Many Unlabelled Nodes.. Mathematische Annalen, Tome 183 (1969), pp. 250-253. http://geodesic.mathdoc.fr/item/MAN_1969__183_161895/