Salle, Joseph La. <br/><br/>
Stability by Liapunov's direst method :  with applications / 
Joseph La Salle and Solomon Lefschetz. 
 - New York :  Academic Press,  1961. 
 - 134 p. :  ill. ;  24 cm. 
 - Mathematics in science and engineering ;  v.4 .
<br/><br/>Includes bibliographical references : p. 131-132. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Stability.