@PhDThesis{	  Engel:2009,
  author	= {M.~Engel},
  title		= {{A Multigrid Method for the Efficient Numerical Solution
		  of Optimization Problems Constrained by Partial
		  Differential Equations}},
  school	= {Institut f\"ur Numerische Simulation, Universit\"{a}t Bonn},
  year		= {2009},
  annote	= {INSdiss,thesis},
  type		= {Dissertation},
  http		= {http://hss.ulb.uni-bonn.de/diss_online/math_nat_fak/2009/engel_martin}
		  ,
  pdf		= {http://wissrech.ins.uni-bonn.de/research/pub/engel/dissertation_engel.pdf}
		  
}