On the definition of hypo-elliptic equations
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 16 (1961) no. 5
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@article{RM_1961_16_5_a4,
author = {E. A. Gorin and V. V. Grushin},
title = {On the definition of hypo-elliptic equations},
journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
publisher = {mathdoc},
volume = {16},
number = {5},
year = {1961},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/RM_1961_16_5_a4/}
}
E. A. Gorin; V. V. Grushin. On the definition of hypo-elliptic equations. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 16 (1961) no. 5. http://geodesic.mathdoc.fr/item/RM_1961_16_5_a4/