1. Infinite Matrices and Sequence Spaces;Cooke,1950
2. Product of a T-matrix and a γ-matrix;Vermes;Journal London Math. Soc.,1946
3. Series to series transformations and analytic continuation by matrix methods;Vermes;American Journal of Math.,1949
4. Conservative series to series transformation matrices;Vermes;Acta Scientiarum Mathematicarum (Szeged),1951
5. On the space (γ) of convergent series;Hill;Tohoku Math. Journal,1939