الخفاجي واثق حياوي لايذ. Estimate Model of Sales Forecast By Using Goal programming Method ( Case Study In Forat Factory to Pure Water). University of Thi-Qar Journal of Science, University of Thi-Qar, Thi-Qar, Iraq, v. 3, n. 4, p. 89–90, 2013. DOI: 10.32792/utq/utjsci/v3i4.551. Disponível em: https://jsci.utq.edu.iq/index.php/main/article/view/551.. Acesso em: 31 mar. 2025.