Samarskii, A.A & Nikolaev, E.S <br/><br/>
Numerical methods for grid equations, Vol.I  direct methods 
A.A. Samarskii & E.S. Nikolaev 
 - Basel  Birkhauser Verlag  1989 
 - xxxv  242 
<br/><br/><label>ISBN: </label>3764322764 
<br/><br/><label>Dewey Class. No.: </label>11.02+11.13+11.14  / SAMA