@article{GDZPPN001251252, title = {Not all fundamental 0-bisimple inverse semigroups contain charts.}, journal = {Semigroup forum}, volume = {12}, year = {1976}, pages = {176-179}, zbl = {0327.20025}, url = {http://dml.mathdoc.fr/item/GDZPPN001251252} }
Reilly, N.R. Not all fundamental 0-bisimple inverse semigroups contain charts.. Semigroup forum, Tome 12 (1976) pp. 176-179. http://gdmltest.u-ga.fr/item/GDZPPN001251252/