Variations on a theme of groups splitting by a quadratic extension and Grothendieck-Serre conjecture for group schemes F 4 with trivial g 3 invariant. Chernousov, V. — 2010 Documenta Mathematica
2-torsion of the Brauer group of an elliptic curve: Generators and relations. Chernousov, V.; Guletskiĭ, V. — 2001 Documenta Mathematica