00357nam a22001217a 4500020001500000040000900015082001700024100001800041110001900059245007500078260003200153650005000185  a0387983279  cNUST  a515.353bTVE  aTveoto Aslak   aWinther Ragnar  aIntroduction to Partial Differential EqationsbA Computtional Approach  aNew York:bSpringer;c1998.  2Introduction to Partial Differential Eqations