1. Beck, A.: On the strong law of large numbers. Ergodic theory, Proc. Inst. Sympos. New Orleans, F.B. Wright, ed. 21?53 (1961)
2. Beck, A.: Conditional independence. Z. Wahrscheinlichkeitstheorie verw. Gebiete, 33, 253?267 (1976)
3. Beck, A., Giesy, D.P.: P-uniform convergence and a vector valued strong law of large numbers. Trans. Amer. Math. Soc. 147, 541?559 (1970)
4. Chatterji, S.D.: Comments on the Martingale Convergence theorem. Symposium on probability methods in Analysis, Lecture notes in Mathematics, 31. Berlin-Heidelberg-New York: Springer 1967
5. Day, M.M.: Normed linear spaces (3rd edition). Berlin-Heidelberg-New York: Springer 1973