Grasman, J <br/><br/>
Asymptotic methods for relaxation oscillations & applications 
J. Grasman 
 - New York  Springer  1987 
 - xiii  221 
 - Applied mathematical sciences 63 .
<br/><br/><label>ISBN: </label>3540965130 
<br/><br/><label>Dewey Class. No.: </label>4.04+12.04  / GRAS