1. Commutative Noetherian and Krull Rings;Balcerzyk,1989
2. Ideals and higher derivations in commutative rings;Brown;Canad. J. Math.,1972
3. Algèbres Enveloppantes;Dixmier,1974
4. Commutative Algebra with a View Toward Algebraic Geometry;Eisenbud,1995
5. Quantum Groups;Kassel,1995