@article{AIF_1982__32_1_129_0,
     author = {Fack, Thierry},
     title = {Finite sums of commutators in $C^*$-algebras},
     journal = {Annales de l'Institut Fourier},
     pages = {129--137},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {32},
     number = {1},
     year = {1982},
     doi = {10.5802/aif.863},
     mrnumber = {83g:46051},
     zbl = {0464.46047},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/aif.863/}
}