@InCollection{	  Gubisch.Neitzel.Volkwein:2016,
  author	= {Gubisch, Martin and Neitzel, Ira and Volkwein, Stefan},
  title		= {A-posteriori error estimation of discrete POD models for
		  PDE-constrained optimal control},
  booktitle	= {Model reduction and approximation: theory and algorithms},
  series	= {Computational Science and Engineering},
  volume	= {},
  pages		= {},
  publisher	= {SIAM},
  year		= {},
  annote	= {series},
  pdf		= {http://neitzel.ins.uni-bonn.de/pub/GNV2016_INS.pdf},
  note		= {accepted. Preprint version available as INS Preprint No.
		  1608.},
  inspreprintnum= {1608}
}