@article{GDZPPN001253840,
title = {A projective limit characterization of GIF semigroups with an N-congruence.},
journal = {Semigroup forum},
volume = {20},
year = {1980},
pages = {267-282},
zbl = {0431.20050},
url = {http://dml.mathdoc.fr/item/GDZPPN001253840}
}
Lord, J.M. A projective limit characterization of GIF semigroups with an N-congruence.. Semigroup forum, Tome 20 (1980) pp. 267-282. http://gdmltest.u-ga.fr/item/GDZPPN001253840/