On the grades of order ideals.
Tchernev, Alexandre
The New York Journal of Mathematics [electronic only], Tome 11 (2005), p. 151-156 / Harvested from The Electronic Library of Mathematics
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Publié le : 2005-01-01
EUDML-ID : urn:eudml:doc:126525 
@article{02245704,
     title = {On the grades of order ideals.},
     journal = {The New York Journal of Mathematics [electronic only]},
     volume = {11},
     year = {2005},
     pages = {151-156},
     zbl = {1098.13012},
     language = {en},
     url = {http://dml.mathdoc.fr/item/02245704}
}

Tchernev, Alexandre. On the grades of order ideals.. The New York Journal of Mathematics [electronic only], Tome 11 (2005) pp. 151-156. http://gdmltest.u-ga.fr/item/02245704/