%0 Journal Article
%A Y. Ke
%A Joseph O'Rourke
%T Lower Bounds on Moving a Ladder in Two and Three Dimensions.
%J Discrete & computational geometry
%D 1988
%P 197-218
%V 3
%N 1-2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DCG_1988__3_1-2_131046/
%F DCG_1988__3_1-2_131046