@article{JRAM_1966__224_150771,
     author = {Robert Fossum},
     title = {The {Noetherian} different of projective orders.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {207--218},
     publisher = {mathdoc},
     volume = {224},
     year = {1966},
     zbl = {0148.26403},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1966__224_150771/}
}