Yoshizawa, T <br/><br/>
Stability theory and the existence of periodic solutions and almost periodic solutions 

 - New York  Springer-Verlag  1975 
 - vii, 233 p. 
<br/><br/><label>ISBN: </label> DM28 
<br/><br/><label>Dewey Class. No.: </label>515.35 783S