1. Dagdelen K (1992) Cutoff grade optimization. In: Proceedings of the 23rd international symposium on application of computers and operations research in minerals industry, pp 157–165
2. Dagdelen K (1993) An NPV optimization algorithm for open pit mine design. In: Proceedings of the 24th international symposium on application of computers and operations research in minerals industry, pp 257–263
3. Lane KF (1988) The economic definition of ore, cut-off grades in theory and practice, 1st edn. Mining Journal Books Limited, London
4. Dagbert M (1987) Cut-off grades: statistical estimation and reality. CIM Bull 80(898):73–76
5. Huang GQ, Du ZY (1996) The method of dynamically optimizing cut-off grade and pre-selection grade. Jiangxi Nonferrous Metals 10(4):1–5 (in chinese)