Partial differential equations II  Elements of the modern theory equations with constant coefficients 
ed by Yu V Egorov and M A Shubin 
 - Berlin  Springer  1994 
 - 263p 
 - Encyclopaedia of mathematical sciences  V.31 .
<br/><br/><label>ISBN: </label>3540520015 
<br/><br/><label>Dewey Class. No.: </label>515.353  / N94.2 (MA)