@article{bwmeta1.element.desklight-2d72c915-f16b-45c3-89f8-4bc636cef2e7,
author = {Rainer Walden},
title = {Closed surfaces in four-spaces with non-vanishing normal curvature},
journal = {Colloquium Mathematicae},
volume = {46},
year = {1982},
pages = {257-262},
zbl = {0503.53043},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-2d72c915-f16b-45c3-89f8-4bc636cef2e7}
}
Rainer Walden. Closed surfaces in four-spaces with non-vanishing normal curvature. Colloquium Mathematicae, Tome 46 (1982) pp. 257-262. http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-2d72c915-f16b-45c3-89f8-4bc636cef2e7/