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@article{JRAM_1978__0299_0300_151980, author = {J.L. Hickman}, title = {Cofinalities of doubly transitive sets.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {7--15}, publisher = {mathdoc}, volume = {0299_0300}, year = {1978}, zbl = {0368.06001}, url = {http://geodesic.mathdoc.fr/item/JRAM_1978__0299_0300_151980/} }
J.L. Hickman. Cofinalities of doubly transitive sets.. Journal für die reine und angewandte Mathematik, 0299_0300 (1978), pp. 7-15. http://geodesic.mathdoc.fr/item/JRAM_1978__0299_0300_151980/