%0 Journal Article %A Kangro, Urve %A Nicolaides, Roy %T Divergence boundary conditions for vector Helmholtz equations with divergence constraints %J ESAIM: Mathematical Modelling and Numerical Analysis %D 1999 %P 479-492 %V 33 %N 3 %I EDP-Sciences %U http://geodesic.mathdoc.fr/item/M2AN_1999__33_3_479_0/ %G en %F M2AN_1999__33_3_479_0