Heinrich, B <br/><br/>
Finite difference methods on irregular networks  generalized approach to second order elliptic problems 
B. Heinrich 
 - Basel  Birkhauser Verlag  1987 
 - 206 
 - International series of numerical mathematics 82 .
<br/><br/><label>ISBN: </label>3764318805 
<br/><br/><label>Dewey Class. No.: </label>11.02  / HEIN