A new upper bound for the 0-1 quadratic knapsack problem

@article{Billionnet1999ANU,
  title={A new upper bound for the 0-1 quadratic knapsack problem},
  author={Alain Billionnet and Alain Faye and {\'E}ric Soutif},
  journal={European Journal of Operational Research},
  year={1999},
  volume={112},
  pages={664-672}
}