%0 Journal Article %A R.J. Gardner %T X-Rays of Polygons. %J Discrete & computational geometry %D 1992 %P 281-294 %V 7 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DCG_1992__7_4_131196/ %F DCG_1992__7_4_131196