@article{MAN_1981__258_163585,
     author = {Prabhakar Rao},
     title = {Liaison {Equivalence} {Classes.}},
     journal = {Mathematische Annalen},
     pages = {169--174},
     year = {1981},
     volume = {258},
     zbl = {0493.14009},
     url = {http://geodesic.mathdoc.fr/item/MAN_1981__258_163585/}
}