Reyn, John. <br/><br/>
Phase Portraits of Planar Quadratic Systems  [electronic resource] / 
by John Reyn. 
 - 1a ed. 
 - Boston, MA :  Springer Science+Business Media, LLC,  2007. 
 -  v.: digital 
 - Mathematics and Its Applications ;  583 .
<br/><br/><label>ISBN: </label>9780387352152 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecuaciones diferenciales<br/>Ecuaciones cuadráticas
<br/><br/><label>LC Class. No.: </label>QA372   / R49 2007