@article{GDZPPN00036522X,
title = {X-Rays of Polygons.},
journal = {Discrete \& computational geometry},
volume = {7},
year = {1992},
pages = {281-294},
zbl = {0748.52003},
url = {http://dml.mathdoc.fr/item/GDZPPN00036522X}
}
Gardner, R.J. X-Rays of Polygons.. Discrete & computational geometry, Tome 7 (1992) pp. 281-294. http://gdmltest.u-ga.fr/item/GDZPPN00036522X/