@article{10_4153_CMB_2011_131_6,
     author = {Krepski, Derek},
     title = {Central {Extensions} of {Loop} {Groups} and {Obstruction} to {Pre-Quantization}},
     journal = {Canadian mathematical bulletin},
     pages = {116--126},
     year = {2013},
     volume = {56},
     number = {1},
     doi = {10.4153/CMB-2011-131-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2011-131-6/}
}