@article{10_4064_ba55_2_6,
     author = {K. Le/sniak},
     title = {On the {Lifshits} {Constant} for {Hyperspaces}},
     journal = {Bulletin of the Polish Academy of Sciences. Mathematics},
     pages = {155--160},
     publisher = {mathdoc},
     volume = {55},
     number = {2},
     year = {2007},
     doi = {10.4064/ba55-2-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ba55-2-6/}
}