Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1979__18_134334, author = {C.J. Ash}, title = {A uniform chain whose inverse semigroup has no chart.}, journal = {Semigroup forum}, pages = {1--4}, publisher = {mathdoc}, volume = {18}, year = {1979}, zbl = {0419.20046}, url = {http://geodesic.mathdoc.fr/item/SF_1979__18_134334/} }
C.J. Ash. A uniform chain whose inverse semigroup has no chart.. Semigroup forum, Tome 18 (1979), pp. 1-4. http://geodesic.mathdoc.fr/item/SF_1979__18_134334/