The Hasse invariant of the trace form of a central simple algebra
Publications Mathématiques de Besançon (1994), article no. 2, 7 p.
@article{PMB_1994____A2_0,
     author = {David W. Lewis and Jorge F. Morales},
     title = {The Hasse invariant of the trace form of a central simple algebra},
     journal = {Publications Math\'ematiques de Besan\c con},
     publisher = {Presses universitaires de Franche-Comt\'e},
     year = {1994},
     doi = {10.5802/pmb.a-72},
     language = {en},
     url = {pmb.centre-mersenne.org/item/PMB_1994____A2_0/}
}
Lewis, David W.; Morales, Jorge F. The Hasse invariant of the trace form of a central simple algebra. Publications Mathématiques de Besançon (1994), article  no. 2, 7 p. doi : 10.5802/pmb.a-72. https://pmb.centre-mersenne.org/item/PMB_1994____A2_0/