1. Aumann RJ, Shapley LS (1974) Values of non-atomic games. Princeton
2. Butzer PL (1953) On two-dimensional Bernstein polynomials. Canadian J Math 5:107?113
3. Dieudonné J (1971) Eléments d' analyse, vol 1, ch VIII. Gauthier Villars, Paris
4. Hille E, Phillips RS (1957) Functional analysis and semigroups. American Mathematical Society Colloquium, V. 31
5. Kingsley C (1951) Bernstein polynomials for functions of two variables of class C( k ) Proceedings of the AMS 2:64?71