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• [2] S. Banach, Théorie des opérations linéaires, Warsaw, 1932.
• [3] A. S. Besicovitch, Almost periodic functions, Cambridge, England, 1932.
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• 1. Nelson Dunford, Spectral theory, Bull. Amer. Math. Soc. 49 (1943), 637–651. MR 0008643 (5,39d), http://dx.doi.org/10.1090/S0002-9904-1943-07965-7
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• [19] Einar Hille, Remarks on ergodic theorems, Trans. Amer. Math. Soc. 57 (1945), 246–269. MR 0012212 (6,276d), http://dx.doi.org/10.1090/S0002-9947-1945-0012212-0
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• [23] Yukiyosi Kawada, Über den Mittelwert der messbaren fastperiodischen Funktionen auf einer Gruppe, Proc. Imp. Acad. Tokyo 19 (1943), 264–266 (German). MR 0014098 (7,240h)
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S. Banach, Théorie des opérations linéaires, Warsaw, 1932.

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A. S. Besicovitch, Almost periodic functions, Cambridge, England, 1932.

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S. Bochner, Vorlesungen über Fouriersche Integrale, Leipzig, 1932.

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H. Bohr and E. Følner, On some types of functional spaces, Acta Math. vol. 76 (1945) pp. 31-155. MR 0013443 (7:154f)

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D. G. Bourgin, Linear topological spaces, Amer. J. Math. vol. 65 (1943) pp. 637-659. MR 0009104 (5:103a)

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J. W. Calkin, Abstract symmetric boundary conditions, Trans. Amer. Math. Soc. vol. 45 (1939) pp. 369-442. MR 1501997

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M. M. Day, Operations in Banach spaces, Trans. Amer. Math. Soc. vol. 51 (1942) pp. 583-608. MR 0006613 (4:14a)

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-, Ergodic theorems for Abelian semi-groups, Trans. Amer. Math. Soc. vol. 51 (1942) pp. 399-412. MR 0006614 (4:14b)

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N. Dunford and B. J. Pettis, Linear operations on summable functions, Trans. Amer. Math. Soc. vol. 47 (1940) pp. 323-392. MR 0002020 (1:338b)

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W. F. Eberlein, Weak compactness in Banach spaces I, Proc. Nat. Acad. Sci. U.S.A. vol. 33 (1947) pp. 51-53. MR 0021239 (9:42a)

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I. Gelfand and M. Neumark, On the imbedding of normed rings into the ring of operators in Hilbert space, Rec. Math. (Math. Sbornik) N.S. vol. 12 (1943) pp. 197-213. MR 0009426 (5:147d)

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R. Godement, Les fonctions de type positif et la théorie des groupes, Trans. Amer. Math. Soc. vol. 63 (1948) pp. 1-84. MR 0023243 (9:327b)

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W. H. Gottschalk, Almost periodicity, equi-continuity, and total boundedness, Bull. Amer. Math. Soc. vol. 52 (1946) pp. 633-636. MR 0016551 (8:34b)

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E. Hille, Remarks on ergodic theorems, Trans. Amer. Math. Soc. vol. 57 (1945) pp. 246-269. MR 0012212 (6:276d)

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D. H. Hyers, Linear topological spaces, Bull. Amer. Math. Soc. vol. 51 (1945) pp. 1-21. MR 0012205 (6:275a)

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S. Kakutani, Two fixed-point theorems concerning bicompact convex sets, Proc. Imp. Acad. Tokyo vol. 14 (1939) pp. 242-245. MR 1568507

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W. Maak, Eine neue Definition der fastperiodischen Funktionen, Abh. Math. Sem. Hamburgischen Univ. vol. 11 (1936) pp. 240-244.

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D. A. Raikov, Harmonic analysis on commutative groups with the Haar measure and the theory of characters (Russian), Travaux de l'Institut Mathématique Stekloff vol. 14 (1945). MR 0017285 (8:133a)

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F. Riesz, Some mean ergodic theorems, J. London Math. Soc. vol. 13 (1938) pp. 274-278.

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V. Smulian, On some problems of the functional analysis, C. R. (Doklady) Acad. Sci. URSS N.S. vol. 38 (1943) pp. 157-159. MR 0008637 (5:38c)

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B. de Sz. Nagy, On uniformly bounded linear transformations in Hilbert space, Acta Univ. Szeged. vol. 11 (1947) pp. 152-157. MR 0022309 (9:191b)

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J. W. Tukey, Convergence and uniformity in topology, Princeton, 1940. MR 0002515 (2:67a)

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A. Weil, L'integration dans les groupes topologiques et ses applications, Actualités Scientifiques et Industrielles, no. 869, Paris, 1940.

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K. Yosida and S. Kakutani, Operator-theoretical treatment of Markoff's process and mean ergodic theorem, Ann. of Math. (2) vol. 42 (1941) pp. 188-228. MR 0003512 (2:230e)

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A. Zygmund, Trigonometrical series, Warsaw, 1935.