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@ARTICLE{,
         author = {C{\'{u}}th, Marek and Johanis, Michal},
          month = aug,
          title = {Isometric embedding of $\ell_1$ into Lipschitz-free spaces and $\ell_\infty$ into their duals},
        journal = {Proc. Amer. Math. Soc.},
         volume = {145},
           year = {2017},
          pages = {3409-3421},
            url = {http://dx.doi.org/10.1090/proc/13590},
            doi = {10.1090/proc/13590},
       abstract = {We show that the dual of every infinite-dimensional Lipschitz-free Banach space contains an isometric copy of $\ell_\infty$ and that it is often the case that a Lipschitz-free Banach space contains a $1$-complemented subspace isometric to $\ell_1$.
Even though we do not know whether the latter is true for every infinite-dimensional Lipschitz-free Banach space, we show that the space is never rotund.},
  Preprint year = {2016}
}