@TechReport{buhmann_et_al:DagSemRep.235,
  author =	{Buhmann, Joachim M. and Maass, Wolfgang and Ritter, Helge and Tishby, Naftali},
  title =	{{Unsupervised Learning (Dagstuhl Seminar 99121)}},
  pages =	{1--27},
  ISSN =	{1619-0203},
  year =	{1999},
  type = 	{Dagstuhl Seminar Report},
  number =	{235},
  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.235},
  URN =		{urn:nbn:de:0030-drops-151219},
  doi =		{10.4230/DagSemRep.235},
}