@article{JLT_1996_6_2_a4,
     author = {K.-H. Neeb},
     title = {A {Note} on {Central} {Extensions} of {Lie} {Groups}},
     journal = {Journal of Lie theory},
     pages = {207--213},
     publisher = {mathdoc},
     volume = {6},
     number = {2},
     year = {1996},
     url = {http://geodesic.mathdoc.fr/item/JLT_1996_6_2_a4/}
}