References
- Deveney , J. K. , Finston , D.R. and Gehrke , M. 1994 . Ga actions on Cn . Comm. Alg , 22 : 4977 – 4988 .
- Dirksen , H. G. J. 1993 . The kernel of a derivation . J. Pure Appl. Alg , 84 : 13 – 16 .
- van den Essen , A. Locally finite and locally nilpotent derivations with applications to polynomial flows, morphisms, and Ga actions, II. Report 9206 , Cath. Univ. Nijmegen .
- Matsumura , H. 1989 . Commutative Ring Theory. Cambridge Studies in Ad¬vanced Mathematics 8. , Cambridge : Cambridge University Press .
- Miyanishi , M. 1985 . Normal affine subalgebras of a polynomial ring. In Alge¬braic and Topological Theories - to the memory of Dr. Takehiko Miyata. , Tokyo : Kinokuniya .
- Nagata , M. 1965 . Lectures on the Fourteenth Problem of Hilbert , Bombay : Tata Insti¬tute of Fundamental Research .
- Roberts , P. 1990 . An infinitely generated symbolic blow-up in a power series ring and a new counterexample to Hilbert's fourteenth problem . . J. Alge¬bra , 132 : 461 – 473 .
- Robinson , E. A. and Treitel , S. 1980 . Geophysical Signal Analysis , Englewood Cliffs : Prentice-Hall .
- Sugie , T. 1989 . Algebraic characterization of the affine plane and the affine three space . In Topological Methods in Algebraic Transformation Groups, ,
- Szego , G. 1981 . Collected Papers , Richard Askey .