Combinatorial results for semigroups of order-decreasing partial transformations.
Laradji, A. ; Umar, A.
Journal of Integer Sequences [electronic only], Tome 7 (2004), / Harvested from The Electronic Library of Mathematics
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Publié le : 2004-01-01
EUDML-ID : urn:eudml:doc:51329 
@article{02186887,
     title = {Combinatorial results for semigroups of order-decreasing partial transformations.},
     journal = {Journal of Integer Sequences [electronic only]},
     volume = {7},
     year = {2004},
     zbl = {1064.05016},
     language = {en},
     url = {http://dml.mathdoc.fr/item/02186887}
}

Laradji, A.; Umar, A. Combinatorial results for semigroups of order-decreasing partial transformations.. Journal of Integer Sequences [electronic only], Tome 7 (2004) . http://gdmltest.u-ga.fr/item/02186887/