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Svoboda, Karel
Remark to the characterization of the sphere in $E^4$. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 18 (1977), issue 4, pp. 715-722
MSC: 53C40, 53C45 | MR 0493901 | Zbl 0368.53039
References:
[1] A. ŠVEC: Contributions to the global differential geometry on surfaces. Rozpravy ČSAV, 87, 1, 1977, 1-94. MR 0467608
[2] K. SVOBODA: Some global characterizations of the sphere in $E^4$. Čas. pгo pěst. matem. - to appear. MR 0512236
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