@PhDThesis{Grue92b,
  author       = {K. Grue},
  year         = {1992},
  title        = {Map Theory -- Preface, Appendix and Index},
  school       = {University of Copenhagen, Faculty of Sciences},
  address      = {DIKU, Universitetsparken 1, DK-2100 Copenhagen, Denmark},
  type         = {Dr.Scient. dissertation},
  month        = oct
}