1. Hibbitt, H. D., Levy, N. J., and Marcal, P. V., “On General Purpose Programs for Nonlinear Finite Element Analysis,” Proc. ASME Sem. Gen. Purpose Finite Element Programs ASME Winter Ann. Meeting, New York (December 1970).
2. Marcal, P. V., “Finite Element Analysis of Combined Problems of Nonlinear Material and Geometric Behavior,” Proc. ASME Joint Comput. Conf. Comput. Approach Appl. Mech. Chicago (1969).
3. “General Theory of Finite Elements,”;Oden;Int. J. Numer. Methods Eng.,1969
4. McNamara, J. F., “Incremental Stiffness Method for Finite Element Analysis of the Nonlinear Dynamic Problem,” Ph.D. Thesis, submitted August (1971).
5. “Stiffness and Deflection Analysis of Complex Structures,”;Turner;J. Aerospace Sci.,1956