1. Hazen, S. W., Jr., 1968, Ore reserve calculations; Can. Inst. Min. Metall. Spec. v. 9, pp. 11–32 (esp. pp. 29–30)
2. Bevan, P. A., 1993, The weighting of assays and the importance of both grade and specific gravity; Can. Inst. Min. Metall. Bull., v. 86, no. 967, pp. 88–90
3. Vallée, M., and S. McCutcheon, 1997, Are international reporting standards feasible? Can. Inst. Min. Metall. Bull., v. 90, no. 1007, pp. 30–37
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