@article{JRAM_1996__472_153801,
     author = {Daniel Quillen},
     title = {Ko for nonunital rings and {Morita} invariance.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {197--217},
     publisher = {mathdoc},
     volume = {472},
     year = {1996},
     zbl = {0837.19001},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1996__472_153801/}
}