1. A guide reporting exploration information, resources and reserves;SME (Society of Mining, Metallurgy and Exploration);Mining Engineering,1991
2. Economics and open pit design-beware of break-even ratios;Lillico;International Journal of Rock Mechanics and Mining Science & Geomechanics Abstracts,1974
3. Hand methods in open pit mine planning and design;Koskiniemi;SME/AIME Transactions,1979
4. Optimum design of open-pit mines;Lerchs;CIM Bulletin,1965
5. Optimum design of open pit mines;Lerchs;CIM Transaction,1965