Conservation of the noetherianity by perfect transcendental field extensions. Magdalena Fernández Lebrón, Luis Narváez Macarro (2003) Revista Matemática Iberoamericana
Cycles of distance-decreasing mappings in the ring of n-adic integers V. I. Sushchanski, E. Moćko, V. V. Nekrashevych (2006) Colloquium Mathematicae We give a description of possible sets of cycle lengths for distance-decreasing maps and isometries of the ring of n-adic integers.