%0 Journal Article
%A Carlos Conca
%A Rajesh Mahadevan
%A Leon Sanz
%T Shape derivative for a two-phase eigenvalue problem and optimal configurations in a ball
%J ESAIM. Proceedings
%D 2009
%P 311-321
%V 27
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.1051/proc/2009034/
%R 10.1051/proc/2009034
%G en
%F EP_2009_27_a18