1. ARNOLD D. N., RIDGWAY SCOTT L. and VOGELIUS M., Regular inversion of the divergence operator with Dirichlet boundary conditions on a polygon, Ann. Scuola Norm. Sup. Pisa, 15 (1988), pp. 169-192.8402810073960702.35208
2. ATTOUCH H. and BUTTAZZO G., Homogenization of reinforced periodic one-codimensional structures, Ann. Scuola Norm. Sup. Pisa, 14(1987), pp. 465-484.840149512290654.73017
3. AZE D. and BUTTAZZO G., Some remarks on the optimal design of periodically reinforced structures, RAIRO Model. Math. Anal. Numer., 23 (1989), pp. 53-61.19355210159190679.49005
4. BRAMBLE J. and ZLAMAL M., Triangular elements in the finite element method, Math. Comp., 24 (1970), pp. 809-820.2825400226.65073
5. BUTTAZZO G. and DAL MASO G., Γ-limits of integral functionals, J. Analyse Math., 37 (1980), pp. 145-185.5836360446.49012