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@article{DCG_1992__7_4_131196, author = {R.J. Gardner}, title = {X-Rays of {Polygons.}}, journal = {Discrete & computational geometry}, pages = {281--294}, publisher = {mathdoc}, volume = {7}, number = {4}, year = {1992}, zbl = {0748.52003}, url = {http://geodesic.mathdoc.fr/item/DCG_1992__7_4_131196/} }
R.J. Gardner. X-Rays of Polygons.. Discrete & computational geometry, Tome 7 (1992) no. 4, pp. 281-294. http://geodesic.mathdoc.fr/item/DCG_1992__7_4_131196/