Collection of problems on the equations of mathematical physics   
ed. by V. S. Vladimirov and Tr. by E. Yankovsky. 
 - Berlin  S-V  1986 
 - 288p 
<br/><br/><label>ISBN: </label>3540166475 
<br/><br/><label>Dewey Class. No.: </label>530.15  / N864