Projective invariant marks of a ruled surface belonging to a given congruence
Doklady Akademii Nauk, Tome 112 (1957) no. 3, pp. 390-393
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@article{DAN_1957_112_3_a5,
author = {R. N. Shcherbakov},
title = {Projective invariant marks of a ruled surface belonging to a given congruence},
journal = {Doklady Akademii Nauk},
pages = {390--393},
year = {1957},
volume = {112},
number = {3},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/DAN_1957_112_3_a5/}
}
R. N. Shcherbakov. Projective invariant marks of a ruled surface belonging to a given congruence. Doklady Akademii Nauk, Tome 112 (1957) no. 3, pp. 390-393. http://geodesic.mathdoc.fr/item/DAN_1957_112_3_a5/