@article{MZ_1991__206_1_174205,
     author = {Fritz Grunewald and Jens Mennicke},
     title = {On symplectic groups over polynomial rings.},
     journal = {Mathematische Zeitschrift},
     pages = {35--56},
     publisher = {mathdoc},
     volume = {206},
     number = {1},
     year = {1991},
     zbl = {0725.20038},
     url = {http://geodesic.mathdoc.fr/item/MZ_1991__206_1_174205/}
}