Sewell, M. J. <br/><br/>
Maximum and minimum principles :  a unified approach with applications / 
M.J. Sewell. 
 - Cambridge ;  Cambridge University Press,  1987. 
 - xvi, 468 p. : 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0521332443 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Maxima and minima.
<br/><br/><label>Dewey Class. No.: </label>511.66  / Ma