@article{lemarechal-renaud-2001,
  author	= {{Lemar{\'e}chal}, C. and Renaud, A.},
  title		= {A geometric study of duality gaps, with applications},
  journal	= {Mathematical Programming},
  volume	= {90},
  number	= {3},
  pages		= {399--427},
  year		= {2001},
}