@MASTERSTHESIS{Lippert1999diplom,
  author  = {Martin Lippert},
  title   = {Die Desktop-Metapher in Systemen nach dem Werkzeug und Material-Ansatz},
  school  = {Universität Hamburg, Fachbereich Informatik},
  year    = {1999},
  type    = {Diplomarbeit},
  address = {Vogt-Kölln-Str. 30, 22527 Hamburg, Germany},
  month   = {11}
}