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@article{MZ_1986__193_173790, author = {Steven A. Mitchell}, title = {A {Filtration} of the {Loops} on {SU} {(N)} by {Schubert} {Varieties.}}, journal = {Mathematische Zeitschrift}, pages = {347--362}, publisher = {mathdoc}, volume = {193}, year = {1986}, zbl = {0613.57025}, url = {http://geodesic.mathdoc.fr/item/MZ_1986__193_173790/} }
Steven A. Mitchell. A Filtration of the Loops on SU (N) by Schubert Varieties.. Mathematische Zeitschrift, Tome 193 (1986), pp. 347-362. http://geodesic.mathdoc.fr/item/MZ_1986__193_173790/