1. Bellman, R.: Introduction to matrix analysis. New York: McGraw-Hill 1960.
2. Bochner, S.: Hilbert distance and positive definite functions. Ann. of Math., II. Ser. 42, 647?656 (1941).
3. Croquet, G.: Theory of capacities. Ann. Inst. Fourier 5, 131?295 (1955).
4. Fitzgerald, C.: On analytic continuation to a Schlicht function. To appear in Proc. Amer. math. Sec.
5. Gnedenko, B. V., and A. N. Kolmogorov: Limit distributions for sums of independent random variables. Reading, Mass.: Addison-Wesley 1954.