@MastersThesis{	  Weiss11,
  author	= "Armin Wei{\ss}",
  title		= "Eine kombinatorische {C}harakterisierung kontextfreier
		  {G}ruppen",
  address	= "Universit{\"a}t Stuttgart",
  year		= "2011",
  type		= "Diplomarbeit {N}r.~3075",
  school	= "Fakult{\"a}t Informatik",
  note		= "Diploma thesis. In German"
}