@incollection{lemarechal-2001,
  author	= {{Lemar{\'e}chal}, C.},
  editor	= {{J{\"u}nger}, M. and Naddef, D.},
  title		= {Lagrangian relaxation},
  booktitle	= {Computational Combinatorial Optimization},
  publisher	= {Springer Verlag, Heidelberg},
  pages		= {115--160},
  year		= {2001},
}