BB	JOHNSON, C. Numerical solution of partial differential equations by the finite element method. 1st Dover ed. [s. l.]: Dover, 2009. ISBN 9780486469003.
BB	LeVeque, Randall J.. Finite difference methods for ordinary and partial differential equations : steady-state and time-dependent problems / Randall J. LeVeque. . Philadelphia : Society for Industrial and Applied Mathematics, cop. 2007
BB	Saad, Yousef. Iterative methods for sparse linear systems / Jousef Saad. 2nd ed. Philadelphia : SIAM Society for industrial and applied mathematics, cop. 2003