Morse, Marston <br/><br/>
Variational analysis :  critical extremals and Sturmian extensions  
Marston Morse 
 - New York  Dover Publications  2007. 
 - 260 p 
<br/><br/> Originally published: New York : John Wiley, 1973. 
<br/><br/><label>ISBN: </label>9780486457871 
<br/><br/><label>Subjects--Index Terms: </label>Critical extremals  Variational theory 
<br/><br/><label>Dewey Class. No.: </label>515.26  / MOR