An analogue of covering space theory for ranked posets.
Hoffman, Michael E.
The Electronic Journal of Combinatorics [electronic only], Tome 8 (2001), / Harvested from The Electronic Library of Mathematics
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Publié le : 2001-01-01
EUDML-ID : urn:eudml:doc:122425 
@article{01666861,
     title = {An analogue of covering space theory for ranked posets.},
     journal = {The Electronic Journal of Combinatorics [electronic only]},
     volume = {8},
     year = {2001},
     zbl = {1007.06004},
     language = {en},
     url = {http://dml.mathdoc.fr/item/01666861}
}

Hoffman, Michael E. An analogue of covering space theory for ranked posets.. The Electronic Journal of Combinatorics [electronic only], Tome 8 (2001) . http://gdmltest.u-ga.fr/item/01666861/