Lefschetz, Solomon, <br/><br/>
Stability of nonlinear control systems / 
Solomon Lefschetz. 
 - New York ;  London :  Academic Press,  1968. 
 - xi, 150 p. 
 - Mathematics in science and engineering  13 .
<br/><br/>Bibliography: p. 144-147. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nonlinear control theory.<br/>Stability