Differential equations : 
King, A. C. 
 - Cambridge ; | New York :  Cambridge University Press,  2003 
 - xi, 541 p. :  ill. ;  26 cm. 
<br/><br/><label>ISBN: </label>0521816580 (hbk.) | 0521016878 (pbk.) | 0521670456 (pbk.