Demir, H. , Erden, C. , Ipek, M. , Uygun, O.. "Solving Weighted Number of Operation Plus Processing Time Due-Date Assignment, Weighted Scheduling and Process Planning Integration Problem Using Genetic and Simulated Annealing Search Methods". World Academy of Science, Engineering and Technology, Open Science Index 121, International Journal of Industrial and Manufacturing Engineering (2017), 11(1), 73 - 81.