%0 Journal Article
%A Beer, Gerald
%T The Continuity of the Visibility Function on a Starshaped Set
%J Canadian journal of mathematics
%D 1972
%P 989-992
%V 24
%N 5
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-100-7/
%R 10.4153/CJM-1972-100-7
%F 10_4153_CJM_1972_100_7