1. Mineral Deposit Evaluation––A Partial Approach;Annels,1991
2. Application of economic parameters and cut-offs during and after pit optimization;Barid;Mining Engineering,2001
3. An Introduction to Optimization;Chong,1996
4. Open-pit Mine Planning and Design, vol. 1;Hustrulid,1995
5. Choosing the optimum cut-off grade;Lane;Quarterly of the Colorado School of Mines,1964