A. Ducros, SEVERI-BRAUER VARIETIES FIBRATIONS ABOVE THE PROJECTIVE LINE OVER THEFUNCTION-FIELD OF A REAL CURVE, Comptes rendus de l'Academie des sciences. Serie 1, Mathematique, 327(1), 1998, pp. 71-75
Let R be an Archimedean real closed field and K be the function field
of an integral, projective, smooth R-curve. We show, by generalizing s
ome demonstrations of [3], relative to conic bundles, that the ''recip
rocity'' obstruction to the Hasse principle is the only one for Severi
-Brauer varieties bundles over P-K(1). (C) Academie des Sciences/Elsev
ier, Paris.