@article{bwmeta1.element.bwnjournal-article-fmv84i1p6bwm,
author = {Hartmut H\"opft},
title = {A normal form for some semigroups generated by idempotents},
journal = {Fundamenta Mathematicae},
volume = {85},
year = {1974},
pages = {75-78},
zbl = {0284.06010},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv84i1p6bwm}
}
Höpft, Hartmut. A normal form for some semigroups generated by idempotents. Fundamenta Mathematicae, Tome 85 (1974) pp. 75-78. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv84i1p6bwm/