Verhulst, F <br/><br/>
Nonlinear differential equations & dynamical systems 
F. Verhulst 
 - Berlin  Springer  1990 
 - ix  277 
 - Universitext .
<br/><br/><label>ISBN: </label>3540506284 
<br/><br/><label>Dewey Class. No.: </label>12.01+6.06  / VERH