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@article{MS2_1981__48_166750, author = {Walter Stromquist}, title = {The maximum distance between two-dimensional {Banach} spaces.}, journal = {Mathematica Scandinavica}, pages = {205--225}, publisher = {mathdoc}, volume = {48}, year = {1981}, zbl = {0475.46011}, url = {http://geodesic.mathdoc.fr/item/MS2_1981__48_166750/} }
Walter Stromquist. The maximum distance between two-dimensional Banach spaces.. Mathematica Scandinavica, Tome 48 (1981), pp. 205-225. http://geodesic.mathdoc.fr/item/MS2_1981__48_166750/