@article{10_4064_sm188_2_3,
     author = {J. Alonso and P. Mart{\'\i}n and P. L. Papini},
     title = {Wheeling around von {Neumann{\textendash}Jordan} constant
 in {Banach} spaces},
     journal = {Studia Mathematica},
     pages = {135--150},
     publisher = {mathdoc},
     volume = {188},
     number = {2},
     year = {2008},
     doi = {10.4064/sm188-2-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm188-2-3/}
}