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2. H. H. Schaefer, Topological Vector Spaces (Mir, Moscow, 1971; Macmillan, 1966).
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4. A. P. Robertson and W. S. Robertson, Topological Vector Spaces (Mir, Moscow, 1967; Cambridge Univ. Press, 1964).
5. V. L. Klee, “Boundedness and Continuity of Linear Functionals,” Duke Math. J. 22, 263 (1955).