%0 Journal Article
%A Kentaro Saji
%A Masaaki Umehara
%A Kotaro Yamada
%T The geometry of fronts
%J Annals of mathematics
%D 2009
%P 491-529
%V 169
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4007/annals.2009.169.491/
%R 10.4007/annals.2009.169.491
%G en
%F 10_4007_annals_2009_169_491