Gerard, R,  <br/><br/>
Equations differentielles et systemes de pfaff dans le champ complexe 
R Gerard  
 - 
 - Springer-Verlag, Berlin  1979 
 - 
 - Lecture Notes in Mathematics, No.0712 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lecture Notes in Mathematics
<br/><br/><label>Dewey Class. No.: </label>R  LNM.0712