@article{EJDE_2013__2013__a41,
     author = {de Medeira,  Cleber},
     title = {Global solvability for involutive systems on the torus},
     journal = {Electronic journal of differential equations},
     year = {2013},
     volume = {2013},
     zbl = {1295.35190},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2013__2013__a41/}
}