Sanders, Jan A., et.al. <br/><br/>
Averaging methods in nonlinear dynamical systems [electronic resource]   
by Jan A Sanders et.al. 
 - New York  Springer  2007 
<br/><br/> http://dx.doi.org/10.1007/978-0-387-48918-6 
<br/><br/><label>ISBN: </label>9780387489186 
<br/><br/><label>Dewey Class. No.: </label>515.352  / (e-book)