Colliot-Thelene, J. L. (1988). The rationality problem for fields of invariants under linear algebraic groups: With special regards to the Bauer groups. ELAM.

Colliot-Thelene, J. L. The Rationality Problem for Fields of Invariants Under Linear Algebraic Groups: With Special Regards to the Bauer Groups. Santiago: ELAM, 1988.

Colliot-Thelene, J. L. The Rationality Problem for Fields of Invariants Under Linear Algebraic Groups: With Special Regards to the Bauer Groups. ELAM, 1988.