Tobias Müller. A counterexample to a conjecture of Grünbaum on piercing convex sets in the plane. Discrete Mathematics, 313(24):2868-2871, 2013. [doi]
@article{Muller13-0,
title = {A counterexample to a conjecture of Grünbaum on piercing convex sets in the plane},
author = {Tobias Müller},
year = {2013},
doi = {10.1016/j.disc.2013.08.025},
url = {http://dx.doi.org/10.1016/j.disc.2013.08.025},
researchr = {https://researchr.org/publication/Muller13-0},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {313},
number = {24},
pages = {2868-2871},
}