1. Sokolnikoff, I. S.,Mathematical Theory of Elasticity, (2nd edition), Mac Graw-Hill (1956).
2. Courant, R. and D. Hilbert,Mathemato-Physical Methods, translated by M. Qian and D. Guo, Science Press, Beijing (1957). (Chinese version)
3. Zhong, W. and X. Zhong, Computational structural mechanics, optimal control and semi—analytical method for PDE,Computer and Structures,37, 6 (1990).
4. Zhong, W. and J. Lin, et al., The eigenvalue problem of the chain of identical substructures and the expansion method solution based on the eigenvectors,Acta Mechanica Sinica,23, 1 (1991).
5. Zhong, W., Eigen solution of discrete LQ control problems,Comput. Struct. Mech. Appl.,7, 2 (1990). (in Chinese)