@article{SF_1982__25_134565,
     author = {J. Siekmann and P. Szab\'o},
     title = {A {Noetherian} and confluent rewrite system for idempotent  semigroups.},
     journal = {Semigroup forum},
     pages = {83--110},
     publisher = {mathdoc},
     volume = {25},
     year = {1982},
     zbl = {0493.68087},
     url = {http://geodesic.mathdoc.fr/item/SF_1982__25_134565/}
}