%0 Journal Article %A Vanmaele, M. %A Van Keer, R. %T An operator method for a numerical quadrature finite element approximation for a class of second-order elliptic eigenvalue problems in composite structures %J ESAIM: Modélisation mathématique et analyse numérique %D 1995 %P 339-365 %V 29 %N 3 %I AFCET - Gauthier-Villars %C Paris %U http://www.numdam.org/item/M2AN_1995__29_3_339_0/ %G en %F M2AN_1995__29_3_339_0