@article{10_1017_S0017089500006078,
     author = {Gundlach, Karl-Bernhard},
     title = {Multiplier systems for {Hilbert's} and {Siegel's} modular groups},
     journal = {Glasgow mathematical journal},
     pages = {57--80},
     year = {1985},
     volume = {26},
     doi = {10.1017/S0017089500006078},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500006078/}
}