1. J. N. Reddy, An Introduction to the Finite Element Method, 3rd ed., Tata McGraw-Hill, (2005).
2. K. J. Bathe, Finite Element Procedures, MIT press, Cambridge(MA), Englewood Cliffs, NJ, (1996).
3. B. A. Szabo, and I. Babuska, Finite Element Analysis, John Wiley & Sons Inc., New York, (1991).
4. A. R. Mitchell, R. Wait, The Finite Element Method in Partial Differential Equations, Wiley, London, (1977).
5. G. Strang, G. J. Fix, An Analysis of Finite Element Method, Prentice-Hall, Englwood Cliffs, NJ, (1973).