First Derivatives: Application to Coupled Equations Arising from the Schrodinger Equation, Journal of Computational Physics, Vol. 3, 1968, pp. 322-326. 8 Fu, C. C. A Method for the Numerical Integration of the Equations of Motion Arising from a Finite-Element Analysis, Journal of Applied Mechanics, Vol. 37, Sept. 1970, pp. 599-605. 9 von Karman, T. and Biot, M. A., Mathematical Methods in Engineering, McGraw-Hill, New York, 1940, pp. 242-244. 10 Wu, R. W-H and Witmer, E. A., Finite Element Analysis of Large Transient Elastic-Plastic Deformations of Simple Structures, with Application to the Engine Rotor Fragment Containment/Deflection Problem, CR-120886 (MIT ASRL TR 154-4), Jan. 1972, NASA.