%0 Journal Article
%A Kamphorst, Sylvie Oliffson
%A Pinto-de-Carvalho, Sônia
%T The first Birkhoff coefficient and the stability of 2-periodic orbits on billiards.
%J Experimental mathematics
%D 2005
%P 299-306
%V 14
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/EXMA_2005__14_3_55277/
%G en
%F EXMA_2005__14_3_55277