@MastersThesis{	  Paprotny:2010,
  author	= {Paprotny, Alexander},
  title		= {Multilevel Methods for Dynamic Programming Equations
		  Related to Recommendation Engines},
  school	= {Technische Universit\"{a}t Hamburg-Harburg},
  year		= {2010},
  annote	= {GMaster}
}