The quantifier semigroup for bipartite graphs.
Schulman, Leonard J.
The Electronic Journal of Combinatorics [electronic only], Tome 18 (2011), / Harvested from The Electronic Library of Mathematics
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Publié le : 2011-01-01
EUDML-ID : urn:eudml:doc:233384 
@article{05913181,
     title = {The quantifier semigroup for bipartite graphs.},
     journal = {The Electronic Journal of Combinatorics [electronic only]},
     volume = {18},
     year = {2011},
     zbl = {1232.06018},
     language = {en},
     url = {http://dml.mathdoc.fr/item/05913181}
}

Schulman, Leonard J. The quantifier semigroup for bipartite graphs.. The Electronic Journal of Combinatorics [electronic only], Tome 18 (2011) . http://gdmltest.u-ga.fr/item/05913181/