On the number of characteristic directions
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 19 (1964) no. 5
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@article{RM_1964_19_5_a7,
author = {L. \'E. Reizi\c{n}\v{s}},
title = {On the number of characteristic directions},
journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
publisher = {mathdoc},
volume = {19},
number = {5},
year = {1964},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/RM_1964_19_5_a7/}
}
L. É. Reiziņš. On the number of characteristic directions. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 19 (1964) no. 5. http://geodesic.mathdoc.fr/item/RM_1964_19_5_a7/