@article{MAN_1960__140_160784,
     author = {A.L. FOSTER and I SUSSMAN},
     title = {On {Rings} in which an (a) = a.},
     journal = {Mathematische Annalen},
     pages = {324--333},
     publisher = {mathdoc},
     volume = {140},
     year = {1960},
     zbl = {0091.03303},
     url = {http://geodesic.mathdoc.fr/item/MAN_1960__140_160784/}
}