@article{MZ_1974__140_172136,
     author = {Robert S. Cunningham and E.A. jr. Rutter},
     title = {Perfect {Modules.}},
     journal = {Mathematische Zeitschrift},
     pages = {105--110},
     publisher = {mathdoc},
     volume = {140},
     year = {1974},
     zbl = {0278.16015},
     url = {http://geodesic.mathdoc.fr/item/MZ_1974__140_172136/}
}