ARNOLD(Vladimir Igorevich) <br/><br/>
Geometrical methods in the theory of ordinary differential equations. 

 - 2nd ed. 
 - Berlin  Springer  1988 
 - Pbk xii p. + 351 
<br/><br/><label>ISBN: </label>0-387-96649-8 
<br/><br/><label>Source: </label>136