@article{GDZPPN00126074X,
title = {Pseudovarieties of completely regular semigroups.},
journal = {Semigroup forum},
volume = {43},
year = {1991},
pages = {1-46},
zbl = {0719.20031},
url = {http://dml.mathdoc.fr/item/GDZPPN00126074X}
}
Pastijn, F. Pseudovarieties of completely regular semigroups.. Semigroup forum, Tome 43 (1991) pp. 1-46. http://gdmltest.u-ga.fr/item/GDZPPN00126074X/