Some results on the dot-depth hierarchy.
Weil, P.
Semigroup forum, Tome 46 (1993), p. 352-370 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1993-01-01
EUDML-ID : urn:eudml:doc:135242 
@article{GDZPPN001262599,
     title = {Some results on the dot-depth  hierarchy.},
     journal = {Semigroup forum},
     volume = {46},
     year = {1993},
     pages = {352-370},
     zbl = {0778.20025},
     url = {http://dml.mathdoc.fr/item/GDZPPN001262599}
}

Weil, P. Some results on the dot-depth  hierarchy.. Semigroup forum, Tome 46 (1993) pp. 352-370. http://gdmltest.u-ga.fr/item/GDZPPN001262599/