1. Adams, R.A., Fournier, J.J.: Sobolev Spaces, vol. 140. Academic Press, Cambridge (2003)
2. Agmon, S., Douglis, A., Nirenberg, L.: Estimates near the boundary for solutions of elliptic partial differential equations satisfying general boundary conditions. I. Commun. Pure Appl. Math. 12, 623–727 (1959)
3. Allaire, G.: Shape Optimization by the Homogenization Method, vol. 146. Springer, Berlin (2001)
4. Allaire, G., Dapogny, C., Delgado, G., Michailidis, G.: Multi-phase structural optimization via a level set method. ESAIM: Control Optim. Calculus Var. 20, 576–611 (2014)
5. Allaire, G., Jouve, F., Toader, A.-M.: Structural optimization using sensitivity analysis and a level-set method. J. Comput. Phys. 194, 363–393 (2004)