On the structure of the GL2 of a ring - Cohn, Paul M. 1924-2006; Manin, Jurij I. 1937-2023; Springer, Tonny A. 1926- (Presses universitaires de France, 1966)
Beigef.1.: Manin, Jurij I.: Rational surfaces over perfect fields. Beigef.2.: Springer, Tonny A.: Some arithmetical results on semi-simple Lie algebras