1. Anderson, D.F., Dobbs, D.E., Roitman, M.: When is a power series ring n-root closed. J. Pure Appl. Algebra 114, 111–131 (1997)
2. Benhissi, A.: t-closed rings of formal power series. Arch. Math. 73, 109–113 (1999)
3. Bourbaki, N.: Elements of Mathematics Commutative Algebra. Hermann, Paris (1972)
4. Brewer, J.W., Nichols, W.D.: Seminormality in power series rings. J. Algebra 82(1), 282–284 (1983)
5. Brewer, J., Weakley, W.D., Montgomery, P.: Seminormality in power series rings in infinitely many variables. In: Al-Khamees, Y. (ed.) Proceedings of the first international conference on mathematics in the Gulf Area, pp. 101–103