@article{IM_1988__92_1_143586,
     author = {Gopal Prasad and M.S. Raghunathan},
     title = {Topological central extensions of {SL1} {(D).}},
     journal = {Inventiones mathematicae},
     pages = {645--689},
     publisher = {mathdoc},
     volume = {92},
     number = {1},
     year = {1988},
     zbl = {0701.20024},
     url = {http://geodesic.mathdoc.fr/item/IM_1988__92_1_143586/}
}