%0 Journal Article
%A M. Sharir
%A B. Aronov
%T Castles in the Air Revisited.
%J Discrete & computational geometry
%D 1994
%P 119-150
%V 12
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DCG_1994__12_1_131322/
%F DCG_1994__12_1_131322