A finiteness condition for finitely generated semigroups

[1]  E. Hotzel.  On finiteness conditions in semigroups , 1979 .

[2]  G. Lallement.  Semigroups and combinatorial applications , 1979 .

[3]  G. Rozenberg,et al.  Pumping Lemmas for Regular Sets , 1981, SIAM J. Comput..

[4]  J. Green,et al.  On semi-groups in which xr = x , 1952, Mathematical Proceedings of the Cambridge Philosophical Society.