@article{RSM_2003__61_1_116637,
     author = {Messina, F.},
     title = {Local solvability for semilinear partial differential equations of constant strength.},
     journal = {Rendiconti del seminario matematico},
     pages = {33--54},
     publisher = {mathdoc},
     volume = {61},
     number = {1},
     year = {2003},
     zbl = {1178.35132},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RSM_2003__61_1_116637/}
}