1. and , An Analysis of the Finite Element Method, Prentice-Hall, Englewood Cliffs, N.J. 1973.
2. The Finite Element Method, Prentice-Hall, Englewood Cliffs, N.J. 1987, Chapter 4.
3. and , Finite Elements, Vol 4: Mathematical Aspects, Prentice-Hall, Englewood Cliffs, N.J. 1983.
4. Higher order accuracy finite-difference schemes for hyperbolic conservation laws
5. Finite element methods for constrained problems in elasticity