Kozlov, V & Maz'ya, V <br/><br/>
Theory of a higher-order sturm-liouville equation 
V. Kozlov & V. Maz'ya 
 - Berlin  Springer  1997 
 - xi  140 
 - Lecture notes in mathematics 1659 .
<br/><br/><label>ISBN: </label>9783540630654 
<br/><br/><label>Dewey Class. No.: </label>10.01+4.04  / KOZL