@article{RMI_2008_2008_1_a7,
     author = {Villamayor U., O. },
     title = {Rees algebras on smooth schemes: integral closure and higher differential operator.},
     journal = {Revista matem\'atica iberoamericana},
     pages = {213-242},
     publisher = {mathdoc},
     volume = {24},
     number = {1},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RMI_2008_2008_1_a7/}
}