We classify locally the induced Riemannian metrics of all irreducible double-ruled hypersurfaces in $\boldkey R^4$.
@article{118940,
author = {Old\v rich Kowalski and Zden\v ek Vl\'a\v sek},
title = {On double-ruled hypersurfaces in $\bold R^4$},
journal = {Commentationes Mathematicae Universitatis Carolinae},
volume = {38},
year = {1997},
pages = {407-411},
zbl = {0891.53005},
mrnumber = {1455509},
language = {en},
url = {http://dml.mathdoc.fr/item/118940}
}
Kowalski, Oldřich; Vlášek, Zdeněk. On double-ruled hypersurfaces in $\bold R^4$. Commentationes Mathematicae Universitatis Carolinae, Tome 38 (1997) pp. 407-411. http://gdmltest.u-ga.fr/item/118940/
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