Navdeep Kailey และ Shivani Saini. (2022) Sufficiency and duality of multi-objective bi-level programming problem under Guignard constraint qualification. <i>Maejo International Journal of Science and Technology</i>, <i>16</i>(1), 13.Navdeep Kailey และ Shivani Saini. "Sufficiency and duality of multi-objective bi-level programming problem under Guignard constraint qualification". Maejo International Journal of Science and Technology 16 (2022):13.Navdeep Kailey และ Shivani Saini. Sufficiency and duality of multi-objective bi-level programming problem under Guignard constraint qualification. Maejo University:ม.ป.ท. 2022.