@article{MZ_1963__82_170196,
     author = {Erika A. Mares},
     title = {Semi-perfect modules.},
     journal = {Mathematische Zeitschrift},
     pages = {347--360},
     publisher = {mathdoc},
     volume = {82},
     year = {1963},
     zbl = {0131.27401},
     url = {http://geodesic.mathdoc.fr/item/MZ_1963__82_170196/}
}