@article{DCG_1994__11_3_131301,
     author = {I. B\'ar\'any and W. Steiger},
     title = {On the {Expected} {Number} of {k-Sets.}},
     journal = {Discrete & computational geometry},
     pages = {243--264},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {1994},
     zbl = {0802.52003},
     url = {http://geodesic.mathdoc.fr/item/DCG_1994__11_3_131301/}
}