@Unpublished{andrzejak1997a,
      AUTHOR = {Andrzejak, Artur and Welzl, Emo},
      TITLE = {k-Sets and j-Facets -- A tour of discrete geometry},
      YEAR = {1997},
      NOTE = {Unfinished},
      ANNOTE = {DATE-ADDED : 2006-09-06 16:19:37 +0200}
}