@article{SF_1976__12_134168,
     author = {N.R. Reilly},
     title = {Not all fundamental 0-bisimple inverse semigroups contain charts.},
     journal = {Semigroup forum},
     pages = {176--179},
     year = {1976},
     volume = {12},
     zbl = {0327.20025},
     url = {http://geodesic.mathdoc.fr/item/SF_1976__12_134168/}
}