Godbillon, C <br/><br/>
Dynamical systems on surfaces 
C. Godbillon 
 - Berlin  Springer  1983 
 - 201 
 - Universitext .
<br/><br/><label>ISBN: </label>3540116451 
<br/><br/><label>Dewey Class. No.: </label>12.02  / GODB