Approximate solutions and optimality conditions of vector variational inequalities in Banach spaces

@article{Yang2008ApproximateSA,
  title={Approximate solutions and optimality conditions of vector variational inequalities in Banach spaces},
  author={X. Q. Yang and X. Y. Zheng},
  journal={J. Global Optimization},
  year={2008},
  volume={40},
  pages={455-462}
}