@article{BAG_1986__22_138335,
     author = {Dieter Ziplies},
     title = {A characterization of the norm of an {Azumaya} algebra of constant rank through the divided powers algebra of an algebra},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {53--70},
     publisher = {mathdoc},
     volume = {22},
     year = {1986},
     zbl = {0609.16003},
     url = {http://geodesic.mathdoc.fr/item/BAG_1986__22_138335/}
}