@article{GDZPPN002421356, title = {Ulm Invariants of the Brauer Group of a Field. II.}, journal = {Mathematische Zeitschrift}, volume = {162}, year = {1978}, pages = {1-4}, zbl = {0367.20033}, url = {http://dml.mathdoc.fr/item/GDZPPN002421356} }
Schacher, Murray; Fein, Burton. Ulm Invariants of the Brauer Group of a Field. II.. Mathematische Zeitschrift, Tome 162 (1978) pp. 1-4. http://gdmltest.u-ga.fr/item/GDZPPN002421356/