@article{liang2003optimality,
  title={Optimality conditions and duality for a minimax fractional programming with generalized convexity},
  author={Liang, Zhi-an and Shi, Zhen-wei},
  journal={Journal of Mathematical Analysis and Applications},
  volume={277},
  number={2},
  pages={474--488},
  year={2003},
  publisher={Elsevier}
}