Petkov, Vesselin. <br/><br/>
Scattering theory for hyperbolic operators / 
Vesselin Petkov. 
 - Amsterdam :  North-Holland, /  1989. 
 - xiv, 373 p. ;  23 cm. 
 - Studies in mathematics and its applications ;  vol. 21. .
<br/><br/>Includes index and Bibliography : p. 355-370. 
<br/><br/><label>ISBN: </label>0444880569 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Boundary value problems.<br/>Scattering operator.<br/>Wave equation.