%0 Journal Article %A John R. Willis %T The construction of effective relations for waves in a composite %J Comptes Rendus. Mécanique %D 2012 %P 181-192 %V 340 %N 4-5 %I Elsevier %R 10.1016/j.crme.2012.02.001 %G en %F CRMECA_2012__340_4-5_181_0