1. Bar-Lev, S.K., Bshouty, D., Enis, P., Letac, G., Lu, I., and Richards, D. (1994), The diagonal natural exponential families on R n and their classification, J. Theoret. Prob., 7, 883–929.
2. Barndorff-Nielsen, O.E. and Koudou, A.E. (1996), Cuts in natural exponential families, Theo. Prob. Appl., 41.
3. Brown, J.L., Jr. (1958), A criteria for the diagonal expansion of a second-order probability density in orthogonal polynomials, IRE Trans. Inform. Theory, vol IT-4, 172.
4. Eagleson, G.K., (1964), Polynomial expansions of bivariate distributions, Ann. Math. Statist. 35, 1208–1215.
5. Eagleson, G.K., (1969), A characterization theorem for the positive definite sequences on the Krawtchouk polynomials, Aust. J. Statist. 11, 29–38.