Peter Frankl. The convex hull of antichains in posets. Combinatorica, 12(4):493-496, 1992.
@article{Frankl92:0,
title = {The convex hull of antichains in posets},
author = {Peter Frankl},
year = {1992},
researchr = {https://researchr.org/publication/Frankl92%3A0},
cites = {0},
citedby = {0},
journal = {Combinatorica},
volume = {12},
number = {4},
pages = {493-496},
}