1. Zienkiewicz O C. The Finite Element Method. McGraw-Hill: New York, 1977
2. Bathe K J. Finite Element Procedures in Engineering Analysis. Prentice-Hall: New Jersey, 1982
3. Bathe K J. Finite Element Procedures. Prentice-Hall: New Jersey, 1996
4. Washizu K. Variational Methods in Elasticity and Plasticity. Pergamon Press: New York, 1982
5. Cook R D. Concepts and Applications of Finite Element Analysis. Wiley: New York, 1981