@PHDTHESIS{Heckmann05Diss,
  AUTHOR =       {Dominik Heckmann},
  TITLE =        {Ubiquitous User Modeling},
  SCHOOL =       {Department of Computer Science, Saarland University},
  YEAR =         {2005},
  type =         {},
  address =      {Germany},
  month =        {November},
}