@article{MZ_1978__163_172735,
     author = {Murray Schacher and Burton Fein},
     title = {Ulm {Invariants} of the {Brauer} {Group} of a {Field.} {II.}},
     journal = {Mathematische Zeitschrift},
     pages = {1--4},
     publisher = {mathdoc},
     volume = {163},
     year = {1978},
     zbl = {0367.20033},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__163_172735/}
}