1. Colliot-Thélène, J.L., Sansuc, J.J.: The rationality problem for fields of invariants under linear algebraic groups (with special regards to the Brauer group). In: Algebraic Groups and Homogeneous Spaces, Tata Inst. Fund. Res. Stud. Math., pp. 113–186. Tata Inst. Fund. Res., Mumbai (2007)
2. Skorobogatov, A.: Torsors and rational points. Cambridge Tracts in Mathematics, vol. 144. Cambridge University Press, Cambridge (2001)
3. Borovoi M.: The Brauer–Manin obstructions for homogeneous spaces with connected or abelian stabilizer. J. Reine Angew. Math. 473, 181–194 (1996)
4. Neukirch J.: Über das Einbettungsproblem der algebraischen Zahlentheorie. Invent. Math. 21, 59–116 (1973)
5. Neukirch J.: On solvable number fields. Invent. Math. 53(2), 135–164 (1979)