@article{10_1090_S0894_0347_09_00650_X,
     author = {Adamczak, Rados\r{A}‚aw and Litvak, Alexander and Pajor, Alain and Tomczak-Jaegermann, Nicole},
     title = {Quantitative estimates of the convergence of the empirical covariance matrix in log-concave ensembles},
     journal = {Journal of the American Mathematical Society},
     pages = {535--561},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {2010},
     doi = {10.1090/S0894-0347-09-00650-X},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-09-00650-X/}
}