فهرس المقالات seyyed ali kazemipour المقاله 1 - Assessing the value efficiency of each unit in relation to the tangent hyper plane in DEA (units including negative data with interval scale) حسین عباسیان سید علی کاظمی پور Iranian Journal of Optimization , العدد 4 , السنة 14 , تابستان 2022
