1. Bass, H., Algebraic group actions on affine spaces. Group actions on rings. ContemporaryMathematics, Vol. 43 (1985), AMS, 1–24.
2. Jurkiewicz, J., On the linearization of actions of linearly reductive groups; Commentari Mathematici Helvetici 64 (1989) 508–513.
3. Kraft, H., Algebraic group actions on affine spaces. Geometry today, Progress in Mathematics. Birkhäuser 1984, 251–266.
4. G.V. Schwarz, Exotic algebraic group actions, preprint.
5. Kraft, H. and Schwarz, G. V., Reductive group actions on affine spaces with one-dimensional quotient. To appear in Contemporary Mathematics, Proceedings of the Conference on Group Actions and Invariant Theory, Montreal 1988.