@article{10_1090_S0894_0347_1990_1040953_6,
     author = {Pollen, David},
     title = {\ensuremath{\mathit{S}}\ensuremath{\mathit{U}}_{\ensuremath{\mathit{I}}}(2,\ensuremath{\mathit{F}}[\ensuremath{\mathit{z}},1/\ensuremath{\mathit{z}}]) for {\ensuremath{\mathit{F}}} a subfield of {\ensuremath{\mathit{C}}}},
     journal = {Journal of the American Mathematical Society},
     pages = {611--624},
     year = {1990},
     volume = {03},
     number = {3},
     doi = {10.1090/S0894-0347-1990-1040953-6},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1990-1040953-6/}
}