Smith, G. D. (1985). Numerical solution of partial differential equations: Finite difference methods (Third edition.). Clarendon Press ; Oxford University Press.

Smith, G. D. Numerical Solution of Partial Differential Equations: Finite Difference Methods. Third edition. Oxford [Oxfordshire] : New York: Clarendon Press ; Oxford University Press, 1985.

Smith, G. D. Numerical Solution of Partial Differential Equations: Finite Difference Methods. Third edition. Clarendon Press ; Oxford University Press, 1985.