A tight lower bound for convexly independent subsets of the Minkowski sums of planar point sets.
Bílka, Ondřej; Buchin, Kevin; Fulek, Radoslav; Kiyomi, Masashi; Okamoto, Yoshio; Tanigawa, Shin-Ichi; Tóth, Csaba D. — 2010
The Electronic Journal of Combinatorics [electronic only]