@article{MAN_1978__232_163084,
     author = {J.P. Jouanolou},
     title = {Hypersurfaces solutions d'une equation de {Pfaff} analytique.},
     journal = {Mathematische Annalen},
     pages = {239--246},
     publisher = {mathdoc},
     volume = {232},
     year = {1978},
     zbl = {0354.34007},
     url = {http://geodesic.mathdoc.fr/item/MAN_1978__232_163084/}
}