Vekua, I.N. <br/><br/>
Generalized analytic functions 
I.N. Vekua 
 - London  Pergamon  1962 
 - xxix,668p.;  22cm.- 
 - International series of monographs in pure and applied mathematics; no.25 .
<br/><br/><label>Dewey Class. No.: </label>515  / VEK