Sameer Kamil Al-Kateeb, and Mahmood Tareq Mahmood. “Using Taguchi Function to Reduce External Failure Costs / A Case Study in General Company for Textiles and Leather Industries/ Cotton Factory (Medical Products Factory)”. Journal of Madenat Alelem University College, Vol. 13, no. 1, June 2021, pp. 281-02, http://116.203.176.164/index.php/JMAUC/article/view/399.