@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/}
}