1. "Shape Optimization by the Homogenization Method,";G. Allaire;Springer,2002
2. "Asymptotic Analysis for Periodic Structures,";A. Bensoussan;North-Holland Company,1978
3. On a class of optimum problems in structural design,;E. Cabib;J. Optim. Theory Appl.,1988
4. "Optimization Theory and Applications, Problems with Ordinary Equations,";L. Cesari;Applications of Mathematics \textbf{17},1983
5. On certain questions in the theory of optimal control,;A. F. Filippov;SAIM J. Control Optim.,1962