@article{DCG_1990__5_2_131135,
     author = {G. K\'os and J. T\"or\"ocsik},
     title = {Convex {Disks} {Can} {Cover} {Their} {Shadow.}},
     journal = {Discrete & computational geometry},
     pages = {529--532},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {1990},
     zbl = {0712.52003},
     url = {http://geodesic.mathdoc.fr/item/DCG_1990__5_2_131135/}
}