Azza H. Amer, and Mahmoud A. Abo-Sinna. 2021. “A New Approach for Solving Bi-Level Multi-Objective Non Linear Programming Model under Neutrosophic Environment”. Neutrosophic Sets and Systems 47 (December): 224-39. https://fs.unm.edu/nss8/index.php/111/article/view/4142.