@article{SF_1989__39_2_134986,
     author = {I. Kossaczky},
     title = {On {Sch\"utzenberger} monoids in transformation semigroups.},
     journal = {Semigroup forum},
     pages = {195--202},
     publisher = {mathdoc},
     volume = {39},
     number = {2},
     year = {1989},
     zbl = {0671.20060},
     url = {http://geodesic.mathdoc.fr/item/SF_1989__39_2_134986/}
}