Mallick MK, Choudhary BS, Budi G. Long-Term Open Pit Mine Production Scheduling with Variable Cut off Grade for Cost Optimization. jmmf [Internet]. 2020 May 1 [cited 2024 May 18];68(5):153-7. Available from: http://www.informaticsjournals.com/index.php/jmmf/article/view/26905