MathSciNet bibliographic data MR1487355 54C35 (54D45 54H05) Arhangel′skii, A. V.; Calbrix, J. A characterization of $\sigma$$\sigma$-compactness of a cosmic space $X$$X$ by means of subspaces of $R^X$$R^X$. Proc. Amer. Math. Soc. 127 (1999), no. 8, 2497–2504. Article

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