@article{10_37236_1433,
     author = {Ljiljana Brankovic and Paulette Lieby and Mirka Miller},
     title = {Flattening antichains with respect to the volume},
     journal = {The electronic journal of combinatorics},
     year = {1999},
     volume = {6},
     doi = {10.37236/1433},
     zbl = {0913.05092},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1433/}
}