@article{1178240831,
author = {Kartsatos, Athanassios G.},
title = {Locally invertible operators and existence problems in differential systems},
journal = {Tohoku Math. J. (2)},
volume = {28},
number = {4},
year = {1976},
pages = { 167-176},
language = {en},
url = {http://dml.mathdoc.fr/item/1178240831}
}
Kartsatos, Athanassios G. Locally invertible operators and existence problems in differential systems. Tohoku Math. J. (2), Tome 28 (1976) no. 4, pp. 167-176. http://gdmltest.u-ga.fr/item/1178240831/