1. Bennett, G.: Unconditional convergence and almost everywhere convergence. Preprint
2. Bessaga, C., Pelczynski, A.: On bases and unconditional convergence of series in Banach spaces. Studia Math.27, 151?164 (1958)
3. Burrill, C.: Measure, integration, and probability. New York: McGraw Hill 1972
4. Dunford, N., Schwartz, J.: Linear operators. Vol. 1. New York: Interscience 1958
5. Garsia, A.: Topics in almost everywhere convergence. Chicago: Markham 1970