| Title: | On the existence of parallel normal vector fields of surfaces in $E^4$ (English) | 
| Author: | Švec, Alois | 
| Language: | English | 
| Journal: | Czechoslovak Mathematical Journal | 
| ISSN: | 0011-4642 (print) | 
| ISSN: | 1572-9141 (online) | 
| Volume: | 26 | 
| Issue: | 2 | 
| Year: | 1976 | 
| Pages: | 297-303 | 
| Summary lang: | Russian | 
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| Category: | math | 
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| MSC: | 53A05 | 
| idZBL: | Zbl 0337.53044 | 
| idMR: | MR0405253 | 
| DOI: | 10.21136/CMJ.1976.101402 | 
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| Date available: | 2008-06-09T14:18:37Z | 
| Last updated: | 2020-07-28 | 
| Stable URL: | http://hdl.handle.net/10338.dmlcz/101402 | 
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| Reference: | [1] B. Wegner: Codazzi-Tensoren und Kennzeichnungen sphärischer Immersionen.Journal of Diff. Geom., Vol. 9, 1974, 61-70. Zbl 0278.53041, MR 0362158 | 
| Reference: | [2] U. Simon: A further method in global differential geometry.Abh. Math. Sem. Hamburg, 44, 1975, 52-69. MR 0394513, 10.1007/BF02992946 | 
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