@article{00907645,
title = {Flag-symmetric and locally rank-symmetric partially ordered sets.},
journal = {The Electronic Journal of Combinatorics [electronic only]},
volume = {3},
year = {1996},
zbl = {0857.05091},
language = {en},
url = {http://dml.mathdoc.fr/item/00907645}
}
Stanley, Richard P. Flag-symmetric and locally rank-symmetric partially ordered sets.. The Electronic Journal of Combinatorics [electronic only], Tome 3 (1996) . http://gdmltest.u-ga.fr/item/00907645/