1. Infinite Matrices and Sequence Spaces;Cooke,1950
2. On the Summation of Periodic Sequences, I and II;Newton;Proc. Kon. Ned. Akad. v. Wetensch.,1954
3. Infinite Matrices summing every Periodic Sequence;Vermes;Proc. Kon. Ned. Akad. v. Wetensch.,1955
4. Divergent Series;Hardy,1949