@TechReport{helmut_et_al:DagSemRep.4,
  author =	{Helmut, Alt and Emo, Welzl},
  title =	{{Algorithmic Geometry (Dagstuhl Seminar 9041)}},
  pages =	{1--19},
  ISSN =	{1619-0203},
  year =	{1991},
  type = 	{Dagstuhl Seminar Report},
  number =	{4},
  institution =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemRep.4},
  URN =		{urn:nbn:de:0030-drops-148928},
  doi =		{10.4230/DagSemRep.4},
}