1. On the symbolic Rees ring of a primary ideal;Katz;Comm. Algebra,1986
2. Asymptotic Prime Divisors;McAdam,1983
3. Commutative Algebra;Matsumura,1980
4. L.J. Ratliff, Jr., Closure operations on ideals and rings, Trans. Amer. Math. Soc., to appear.
5. Two notes on reductions of ideals;Ratliff;Indiana Univ. Math. J.,1978