Reduction numbers, Briançon-Skoda theorems and the depth of Rees rings Ian M. Aberbach, Craig Huneke, Ngô Viêt Trung (1995) Compositio Mathematica
Rees algebras on smooth schemes: integral closure and higher differential operator. O. Villamayor U. (2008) Revista Matemática Iberoamericana
Rings of global sections in two-dimensional schemes. Brenner, Holger (2001) Beiträge zur Algebra und Geometrie