@article{10_37236_484,
     author = {Ond\v{r}ej B{\'\i}lka and Kevin Buchin and Radoslav Fulek and Masashi Kiyomi and Yoshio Okamoto and Shin-ichi Tanigawa and Csaba D. T\'oth},
     title = {A tight lower bound for convexly independent subsets of the {Minkowski} sums of planar point sets},
     journal = {The electronic journal of combinatorics},
     year = {2010},
     volume = {17},
     doi = {10.37236/484},
     zbl = {1205.52010},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/484/}
}