Daniel J. Kleitman, András Gyárfás, Géza Tóth. Convex Sets in the Plane with Three of Every Four Meeting. Combinatorica, 21(2):221-232, 2001. [doi]
@article{KleitmanGT01,
title = {Convex Sets in the Plane with Three of Every Four Meeting},
author = {Daniel J. Kleitman and András Gyárfás and Géza Tóth},
year = {2001},
url = {http://link.springer.de/link/service/journals/00493/bibs/1021002/10210221.htm},
researchr = {https://researchr.org/publication/KleitmanGT01},
cites = {0},
citedby = {0},
journal = {Combinatorica},
volume = {21},
number = {2},
pages = {221-232},
}