@article{02217048,
title = {Local solvability for semilinear partial differential equations of constant strength.},
journal = {Rendiconti del Seminario Matematico},
volume = {61},
year = {2003},
pages = {33-54},
zbl = {1178.35132},
language = {en},
url = {http://dml.mathdoc.fr/item/02217048}
}
Messina, F. Local solvability for semilinear partial differential equations of constant strength.. Rendiconti del Seminario Matematico, Tome 61 (2003) pp. 33-54. http://gdmltest.u-ga.fr/item/02217048/