Cohomological invariants of classical Weyl groups modulo 2
  In a previous paper, we showed that all the cohomological invariants of Weyl groups are completely determined by their restrictions to the abelian subgroups generated by reflections. Using this principle, we describe all the cohomological invariants of the Weyl groups of classical type modulo 2. 
J\'er\^ome Ducoat
math.AG