@book{bonnans-gilbert-lemarechal-sagastizabal-2003,
  author	= {Bonnans, J. F. and Gilbert, J. Ch. and {Lemar{\'e}chal}, C. and {Sagastiz{\'a}bal}, C.},
  title		= {Numerical Optimization},
  publisher	= {Springer Verlag},
  year		= {2003},
}