@article{CMH_1987__62_140076,
     author = {Friedrich Knop and Gisela Menzel},
     title = {Duale {Variet\"aten} von {Fahnenvariet\"aten.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {38--61},
     publisher = {mathdoc},
     volume = {62},
     year = {1987},
     zbl = {0625.14028},
     url = {http://geodesic.mathdoc.fr/item/CMH_1987__62_140076/}
}