@article{ADM_2015_19_2_a2,
     author = {T. Gu\'ed\'enon},
     title = {Projectivity and flatness over the graded ring of normalizing elements},
     journal = {Algebra and discrete mathematics},
     pages = {172--192},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2015_19_2_a2/}
}