1. Armstrong W. L. and Landon J. A. (1973). “Dynamic testing of curved box beam bridge.” Federal Highway Research and Development Report No. 73‐1 Fed. Highway Admin. Feb.
2. Bathe K. J. and Wilson E. L. (1976). Numerical methods infinite element analysis . Prentice‐Hall Inc. Englewood Cliffs N.J.
3. Stability and accuracy analysis of direct integration methods
4. Bathe K. J. Wilson E. L. and Peterson F. E. (1973). “SAPIV—A structural analysis program for static and dynamic response of linear systems.” Report EERC 73‐11 Coll. of Engrg. Univ. of California Berkeley Calif. June.