no. 1
A note on type P methods of summation
Compositio Mathematica, Tome 22 (1970) no. 1, pp. 23-28 
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Brown, H. I. A note on type $P$ methods of summation. Compositio Mathematica, Tome 22 (1970) no. 1, pp. 23-28. https://www.numdam.org/item/CM_1970__22_1_23_0/

S. Banach [1] Theorie des operation linearies, Monografje Matenatyczne, Warsaw, 1932. | JFM

E.I. Jürimaë [2] Topological properties of conull summation methods, Tartu. Riikl. Ül. Toim. No. 177 (1965), 43-61. (Russian.)

M.S. Macphail [3] On some recent developments in the theory of series, Canad. J. Math. 6 (1954), 405-409. | Zbl

S. Mazur [4] Eine Anwendung der Theorie der Operationen bei der Untersuchung der Toeplitzschen Limitierungsverfahren, Studia Math. 2 (1930), 40-50. | JFM

A. Wilanshy [5] An application of Banach linear functionals to summability, Trans. Amer. Math. Soc. 67 (1949), 59-68. | Zbl | MR

A. Wilansky [6] Distinguished subsets and summability invariants, J. d'Analyse Math. 12 (1964), 327-350. | Zbl

A. Wilansky [7] Functional Analysis, Blaisdell, New York, 1964. | Zbl | MR

K. Zeller [8] Theorie der Limitierungsverfahren, Berlin, 1958. | Zbl | MR