@article{01894851,
title = {Smooth lines on projective planes over two-dimensional algebras and submanifolds with degenerate Gauss maps.},
journal = {Beitr\"age zur Algebra und Geometrie},
volume = {44},
year = {2003},
pages = {165-178},
zbl = {1038.53014},
language = {en},
url = {http://dml.mathdoc.fr/item/01894851}
}
Akivis, Maks A.; Goldberg, Vladislav V. Smooth lines on projective planes over two-dimensional algebras and submanifolds with degenerate Gauss maps.. Beiträge zur Algebra und Geometrie, Tome 44 (2003) pp. 165-178. http://gdmltest.u-ga.fr/item/01894851/