@article{GDZPPN000364576, title = {Convex Disks Can Cover Their Shadow.}, journal = {Discrete \& computational geometry}, volume = {5}, year = {1990}, pages = {529-532}, zbl = {0712.52003}, url = {http://dml.mathdoc.fr/item/GDZPPN000364576} }
Kós, G.; Töröcsik, J. Convex Disks Can Cover Their Shadow.. Discrete & computational geometry, Tome 5 (1990) pp. 529-532. http://gdmltest.u-ga.fr/item/GDZPPN000364576/