@inproceedings{qh1999the,
title={The existence of nonlinear inequalities},
author={QH Ansari, Ngai-Ching Wong, and Jen-Chih Yao},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020204750693840158},
booktitle={Applied Mathematics Letters},
volume={12},
number={5},
pages={89-92},
year={1999},
}
QH Ansari, Ngai-Ching Wong, and Jen-Chih Yao. The existence of nonlinear inequalities. 1999. Vol. 12. In Applied Mathematics Letters. pp.89-92. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020204750693840158.