@article{10_4064_sm199_1_5,
     author = {F. Baudier and N. J. Kalton and G. Lancien},
     title = {A new metric invariant for {Banach} spaces},
     journal = {Studia Mathematica},
     pages = {73--94},
     publisher = {mathdoc},
     volume = {199},
     number = {1},
     year = {2010},
     doi = {10.4064/sm199-1-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm199-1-5/}
}