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## Birational automorphisms of Severi-Brauer surfaces

Sbornik Mathematics. 2020. P. 466-480.

We prove that a finite group acting by birational automorphisms of a nontrivial Severi-Brauer surface over a field of characteristic zero contains a normal abelian subgroup of index at most 3. Also, we find an explicit bound for the orders of such finite groups in the case when the base field contains all roots of 1.