1. Allocations of Probability: A Theory of Partial Belief;Shafer,1974
2. A Mathematical Theory of Evidence;Shafer,1976
3. Upper and lower probabilities induced by multivalued mapping;Dempster;Ann. Math. Statist.,1967
4. Theory of capacities;Choquet;Ann. Inst. Fourier, Univ. (Grenoble),1953
5. Foundations of a Theory of Random Sets;Kendall,1974