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March 1964 Characterization of $n$-spheres by an excluded middle membrane principle.
R. F. Dickman, L. R. Rubin, P. M. Swingle
Michigan Math. J. 11(1): 53-59 (March 1964). DOI: 10.1307/mmj/1028999034
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Vol.11 • No. 1 • March 1964
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