@article{MAN_1978__232_163089,
     author = {T. Sund},
     title = {Multiplier {Representations} of {Exponential} {Lie} {Groups.}},
     journal = {Mathematische Annalen},
     pages = {287--290},
     year = {1978},
     volume = {232},
     zbl = {0374.22009},
     url = {http://geodesic.mathdoc.fr/item/MAN_1978__232_163089/}
}