%0 Journal Article %A V. Kantabutra %T Motions of a Short-Linked Robot Arm in a Square. %J Discrete & computational geometry %D 1992 %P 69-76 %V 7 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DCG_1992__7_4_131181/ %F DCG_1992__7_4_131181