Hartman, Philip <br/><br/>
Ordinary differential equations 

 - 2nd ed. 
 - Boston  Birkhauser  1982 
 - xvi, 612p, 24cm 
<br/><br/><label>ISBN: </label>3764330686 
<br/><br/><label>Dewey Class. No.: </label>515.352,  / D, har