@unpublished{DemaineFeketeRoteetal.2010,
  author  = {Erik D. Demaine and S{\´a}ndor P. Fekete and G{\"u}nter Rote and Nils Schweer and Daria Schymura and Mariano Zelke},
  title   = {Integer point sets minimizing average pairwise L1 distance: What is the optimal shape of a town?},
  institution = {Informatik},
  pages     = {13},
  year    = {2010},
}