@article{gw-vcdpha-94
, author =      "B. G{\"a}rtner and E. Welzl"
, title =       "Vapnik-{Chervonenkis} dimension and (pseudo-)hyperplane
                 arrangements"
, journal =     "Discrete Comput. Geom."
, volume =      12
, year =        1994
, pages =       "399--432"
}