Haidar Shakir Nwry. “"Choosing the Best Policy for Demand Tracking Strategy in Aggregate planning" Case Study in Diyala General Company for Electrical Industries / Power Transformers Factory”. The Scientific Journal of Cihan University– Sulaimaniya, vol. 1, no. 3, May 2017, pp. 110-31, doi:10.25098/1.3.7.