On the homotopy classification of Douglis–Nirenberg elliptic systems
Doklady Akademii Nauk, Tome 225 (1975) no. 6, pp. 1275-1277
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@article{DAN_1975_225_6_a9,
author = {V. I. Shevchenko},
title = {On the homotopy classification of {Douglis{\textendash}Nirenberg} elliptic systems},
journal = {Doklady Akademii Nauk},
pages = {1275--1277},
year = {1975},
volume = {225},
number = {6},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/DAN_1975_225_6_a9/}
}
V. I. Shevchenko. On the homotopy classification of Douglis–Nirenberg elliptic systems. Doklady Akademii Nauk, Tome 225 (1975) no. 6, pp. 1275-1277. http://geodesic.mathdoc.fr/item/DAN_1975_225_6_a9/