5Michell G M. The limits of economy of materials in frame structures [ J]. Philosophical Magazine, Series 6, 1904,8 (47) :589 -597.
6K. T. Cheng, N. Olhoff. An Investigation Concerning Opti- mal Design of Solid Elastic Plates [ J]. International Journal of Solids and Structures. 1981,17:305 - 323.
7K. T. Cheng, N. Olhoff. On Non-Smoothness in Optima De- sign of Solid Elastic Plates [ J ] , International Journal of Sol- ids and Structures. 1981,17 ( 7 ) : 59 - 81.
8M. P. Bendsoe, N. Kikuchi. Generating Optimal Topologies in Structural Design Using a Homo-genization Method [ J ]. Computer Methods in Applied Mechanics and Engineering. 1988,71 ( 1 ) : 197 - 224.
9M. P. Bendsoe, Ole. Topology Optimization Theory, Meth- ods and Applications [ M ]. Sigmund springer ,2003 : 1 - 10.
10Virtual topological optimization of scaffolds for rapid prototy- ping Henrique de Amorim Almeida[J] , Paulo Jorge da Silva Brtolo Medical Engineering & Physics 32(2010) :775 -782.