1.
راهيع, حميدز, حميدز. Usage of non-linear programming in building a mathematical model for production planning according to discount constraints put on bought amount. JEAS [Internet]. 1Dec.2016 [cited 3Dec.2019];22(94):450. Available from: http://jeasiq.uobaghdad.edu.iq/index.php/JEASIQ/article/view/417