Muhammad Bilal Khan, Muhammad Aslam Noor, and Khalida Inayat Noor. “On Fuzzy Quasi-Invex Sets”. International Journal of Algebra and Statistics 9, no. 1-2 (August 23, 2020): 11–26. Accessed June 13, 2021. https://m-sciences.com/?journal=ijas&page=article&op=view&path[]=1613.