Delgoshaei, Aidin, Mohd Khairol Ariffin, B. T. Hang Tuah Bin Baharudin, and Zulkiflle Leman. “A Backward Approach for Maximizing Net Present Value of Multi-Mode Pre-Emptive Resource-Constrained Project Scheduling Problem With Discounted Cash Flows Using Simulated Annealing Algorithm”. International Journal of Industrial Engineering and Management 5, no. 3 (September 30, 2014): 151–158. Accessed September 20, 2024. http://sp.ftn.uns.ac.rs/index.php/ijiem/article/view/264.