@article{10_4007_annals_2005_162_711,
     author = {Uffe Haagerup and Steen Thorbj{\o}rnsen},
     title = {A new application of random matrices: {Ext}$(C^*_{\mathrm{red}}(F_2))$ is not a group},
     journal = {Annals of mathematics},
     pages = {711--775},
     publisher = {mathdoc},
     volume = {162},
     number = {2},
     year = {2005},
     doi = {10.4007/annals.2005.162.711},
     mrnumber = {2183281},
     zbl = {1103.46032},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2005.162.711/}
}