@article{JRAM_1995__458_153678,
     author = {Jaap Kalkman},
     title = {Cohomology rings of symplectic quotients.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {37--52},
     year = {1995},
     volume = {458},
     zbl = {0851.57029},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1995__458_153678/}
}