Kreith, Kurt. <br/><br/>
Oscillation theory / 
Kurt Kreith. 
 - Berlin ;  Springer-Verlag,  1973. 
 - vi, 109 p. ; 
<br/><br/><label>ISBN: </label>0387062580 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Partial.
<br/><br/><label>Dewey Class. No.: </label>515.35  / Os