@article{MAN_1986__276_164193,
     author = {Kevin M. Ryan},
     title = {On {Schubert} {Varieties} in the {Flag} {Manifold} of {SI} (n, {C).}},
     journal = {Mathematische Annalen},
     pages = {205--224},
     year = {1986},
     volume = {276},
     zbl = {0579.14045},
     url = {http://geodesic.mathdoc.fr/item/MAN_1986__276_164193/}
}