@article{MZ_1965__90_170498,
     author = {Donald Livingstone and Ascher Wagner},
     title = {Transitivity of finite permutation groups on unordered sets.},
     journal = {Mathematische Zeitschrift},
     pages = {393--403},
     publisher = {mathdoc},
     volume = {90},
     year = {1965},
     zbl = {0136.28101},
     url = {http://geodesic.mathdoc.fr/item/MZ_1965__90_170498/}
}