@article{02161288,
title = {Directed subgraph complexes.},
journal = {The Electronic Journal of Combinatorics [electronic only]},
volume = {11},
year = {2004},
zbl = {1060.05038},
language = {en},
url = {http://dml.mathdoc.fr/item/02161288}
}
Hultman, Axel. Directed subgraph complexes.. The Electronic Journal of Combinatorics [electronic only], Tome 11 (2004) . http://gdmltest.u-ga.fr/item/02161288/