Higher chain formula proved by combinatorics.
Ma, Tsoy-Wo
The Electronic Journal of Combinatorics [electronic only], Tome 16 (2009), / Harvested from The Electronic Library of Mathematics
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Publié le : 2009-01-01
EUDML-ID : urn:eudml:doc:233371 
@article{05686760,
     title = {Higher chain formula proved by combinatorics.},
     journal = {The Electronic Journal of Combinatorics [electronic only]},
     volume = {16},
     year = {2009},
     zbl = {1226.05010},
     language = {en},
     url = {http://dml.mathdoc.fr/item/05686760}
}

Ma, Tsoy-Wo. Higher chain formula proved by combinatorics.. The Electronic Journal of Combinatorics [electronic only], Tome 16 (2009) . http://gdmltest.u-ga.fr/item/05686760/