Gurlebeck, Klaus <br/><br/>
Quaternionic Analysis and Elliptic Boundary Value Problems ( ISNM 89 ) 
/ by Klaus Gurlebeck 
 - Berlin;  Birkhauser-Verlag:  1990. 
 - 253p. 
<br/><br/><label>ISBN: </label>3764323825 
<br/><br/><label>Dewey Class. No.: </label>518  / GUR/Q