@article{10_4064_cm113_2_4,
     author = {T. Banakh and R. Voytsitskyy},
     title = {Characterizing metric
spaces whose hyperspaces are homeomorphic to  $\ell _2$},
     journal = {Colloquium Mathematicum},
     pages = {223--229},
     publisher = {mathdoc},
     volume = {113},
     number = {2},
     year = {2008},
     doi = {10.4064/cm113-2-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm113-2-4/}
}