@article{GDZPPN000363022,
title = {More on k-Sets of Finite Sets in the Plane.},
journal = {Discrete \& computational geometry},
volume = {1},
year = {1986},
pages = {95-100},
zbl = {0598.52007},
url = {http://dml.mathdoc.fr/item/GDZPPN000363022}
}
Welzl, E. More on k-Sets of Finite Sets in the Plane.. Discrete & computational geometry, Tome 1 (1986) pp. 95-100. http://gdmltest.u-ga.fr/item/GDZPPN000363022/