@article{article70ed5b40,
title   = {Closed hypersurfaces of S-4(1) with constant mean curvature and zero Gauss-Kronecker curvature},
author = {Lusala, Tsasa and Gomes, André de Oliveira},
year = {2005},
doi = {10.1016/j.crma.2005.01.005},
journal   = {Comptes Rendus Mathematique}
}