@article{JAC_1999__9_2_a0,
     author = {Wachs, Michelle L.},
     title = {Whitney homology of semipure shellable posets},
     journal = {Journal of Algebraic Combinatorics},
     pages = {173--207},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_1999__9_2_a0/}
}