Lakshmikantham, V., <br/><br/>
Practical stability of nonlinear systems / 
V. Lakshmikantham, S. Leela, A. A. Martynyuk. 
 - Singapore :  World Scientific,  1990. 
 - 207 pages :  illustration ;  22 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>9810203519 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Control theory<br/>Differential equations<br/>Liapunov functions<br/>Stability