The solvability and hypoellipticity of differential equations
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 29 (1974) no. 1
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@article{RM_1974_29_1_a23,
author = {P. R. Popivanov},
title = {The solvability and hypoellipticity of differential equations},
journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
publisher = {mathdoc},
volume = {29},
number = {1},
year = {1974},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/RM_1974_29_1_a23/}
}
P. R. Popivanov. The solvability and hypoellipticity of differential equations. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 29 (1974) no. 1. http://geodesic.mathdoc.fr/item/RM_1974_29_1_a23/