Nguyễn , Văn Hưng, and Thị Hoài An Ngô. 2019. “ON THE UPPER SEMICONTINUITY OF SOLUTION MAPPINGS FOR PARAMETRIC WEAK VECTOR BILEVEL EQUILIBRIUM PROBLEMS”. Ho Chi Minh City University of Education Journal of Science 16 (12):993. https://doi.org/10.54607/hcmue.js.16.12.2562(2019).