00299nam a2200121Ia 4500082001600000100002100016245003700037260003400074300002000108490003900128500000500167700000500172  a512bJ86.ED  aJouanolou, J. P.  aEquations de Pfaff algebriquesb  aBerlinbSpringer-Verlagc1979  aiv, 255p. Index  aLecture notes in Mathematicsv 708  a  a