@article{CRMATH_2015__353_6_471_0,
     author = {Nikiforov, Vladimir},
     title = {The trace norm of \protect\emph{r}-partite graphs and matrices},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {471--475},
     publisher = {Elsevier},
     volume = {353},
     number = {6},
     year = {2015},
     doi = {10.1016/j.crma.2015.03.013},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1016/j.crma.2015.03.013/}
}