@article{PMB_1994____A2_0,
     author = {Lewis, David W. and Morales, Jorge F.},
     title = {The {Hasse} invariant of the trace form of a central simple algebra},
     journal = {Publications math\'ematiques de la Facult\'e des sciences de Besan\c{c}on. Th\'eorie des nombres},
     eid = {2},
     pages = {1--7},
     publisher = {Universit\'e de Besan\c{c}on},
     year = {1994},
     doi = {10.5802/pmb.a-72},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/pmb.a-72/}
}