@article{10_1090_S0894_0347_1990_1029692_5,
     author = {Soergel, Wolfgang},
     title = {Kategorie {\ensuremath{\mathscr{O}},} perverse {Garben} und {Moduln} \"uber den {Koinvarianten} zur {Weylgruppe}},
     journal = {Journal of the American Mathematical Society},
     pages = {421--445},
     year = {1990},
     volume = {03},
     number = {2},
     doi = {10.1090/S0894-0347-1990-1029692-5},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1990-1029692-5/}
}