1. Abramowitz, M., Stegun, I.A.: Handbook of mathematical functions. National Bureau of Standards No. 55, Washington D.C., 1970
2. Billingsley, P.: Convergence of probability measures. New York: Wiley 1968
3. Billingsley, P.: Probability and measure. New York: Wiley 1979
4. Buchta, C.: Stochastische Approximation konvexer Polygone. Z. Wahrscheinlichkeitstheor. Verw. Geb. 67, 283–304 (1984)
5. Lect. Notes Math.;C. Buchta,1985