Dumortier, Freddy. <br/><br/>
Qualitative theory of planar differential systems/ 
Freddy Dumortier, Jaume Llibre, Joan C. Artés. 
 - New York;  Berlin:  Springer,  c2006. 
 - xvi, 298 p.:  ill.;  24 cm. 
 - Universitext .
 - Universitext. .
<br/><br/>Includes bibliographical references (p. [285]-293) and index. 
<br/><br/><label>ISBN: </label>9783540328933 (pbk.) 3540328939 (pbk.) 
<br/><br/><label>Publisher. No.: </label>11371328 
<br/><br/><label>LCCN: </label>2006924563 
<br/><br/><label>Nat. Bib. No.: </label>06,A43,0848  dnb 06,N10,1100  dnb 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations--Qualitative theory.<br/>Differential equations--Numerical solutions.<br/>Artés, Joan C.,
<br/><br/><label>Dewey Class. No.: </label>515.35  / D894q