Partial differential equations VII : 
Shubin, M. A. 
 - Berlin ; | New York :  Springer-Verlag,  1994 
 - 272 p. :  ill. ;  25 cm. 
<br/><br/> Translated from the Russian by T. Zastawniak. | Authors: G.V. Rozenblum, M.A. Shubin, M.Z. Solomyak. 
<br/><br/><label>ISBN: </label>3540546774 (Berlin) | 0387546774 (New York)