Group properties (in the large) of second order partial differential equations
Doklady Akademii Nauk, Tome 181 (1968) no. 5, pp. 1073-1076
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@article{DAN_1968_181_5_a11,
author = {I. I. Tugov},
title = {Group properties (in the large) of second order partial differential equations},
journal = {Doklady Akademii Nauk},
pages = {1073--1076},
publisher = {mathdoc},
volume = {181},
number = {5},
year = {1968},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/DAN_1968_181_5_a11/}
}
I. I. Tugov. Group properties (in the large) of second order partial differential equations. Doklady Akademii Nauk, Tome 181 (1968) no. 5, pp. 1073-1076. http://geodesic.mathdoc.fr/item/DAN_1968_181_5_a11/