@article{DCG_1992__7_4_131184,
     author = {J. Pach and E. Szemeredi and W. Steiger},
     title = {An {Upper} {Bound} on the {Number} of {Planar} {K-Sets.}},
     journal = {Discrete & computational geometry},
     pages = {109--124},
     publisher = {mathdoc},
     volume = {7},
     number = {4},
     year = {1992},
     zbl = {0765.68211},
     url = {http://geodesic.mathdoc.fr/item/DCG_1992__7_4_131184/}
}