Closed hypersurfaces of S 4 with two constant symmetric curvatures
Annales de la Faculté des sciences de Toulouse : Mathématiques, Série 6, Tome 6 (1997) no. 2, pp. 187-202. 
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     author = {Carneiro de Almeida, Sebasti\~ao and Gustavo Braga Brito, Fabiano},
     title = {Closed hypersurfaces of $S^4$ with two constant symmetric curvatures},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {187--202},
     publisher = {Universit\'e Paul Sabatier. Facult\'e des sciences},
     address = {Toulouse},
     volume = {Ser. 6, 6},
     number = {2},
     year = {1997},
     mrnumber = {1611812},
     zbl = {0905.53041},
     language = {en},
     url = {http://archive.numdam.org/item/AFST_1997_6_6_2_187_0/}
}
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Carneiro de Almeida, Sebastião; Gustavo Braga Brito, Fabiano. Closed hypersurfaces of $S^4$ with two constant symmetric curvatures. Annales de la Faculté des sciences de Toulouse : Mathématiques, Série 6, Tome 6 (1997) no. 2, pp. 187-202. http://archive.numdam.org/item/AFST_1997_6_6_2_187_0/

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