1. Infinite matrices and sequence spaces;Cooke,1950
2. Matrix transformations of (C, –1) summable series;Maddox;Proc. Kon. Ned. Akad. van Wetensch.,1965
3. Maddox, I. J., Generalised Cesàro means of order –1, Proc. Glasgow Math. Assn. (to appear shortly).
4. Functional Analysis;Yosida,1965