(EN) Jim Coykendall, Progress on the dimension question for power series rings, in James W. Brewer, Sarah Glaz, William J. Heinzer e Bruce M. Olberding (a cura di), Multiplicative Ideal Theory in Commutative Algebra, Springer, 2006, DOI:10.1007/978-0-387-36717-0_8, ISBN0-387-24600-2.