@article{10_4064_fm_108_2_109_118,
     author = {J. Chartonik},
     title = {Contractibility and continous selections},
     journal = {Fundamenta Mathematicae},
     pages = {109--118},
     publisher = {mathdoc},
     volume = {108},
     number = {2},
     year = {1980},
     doi = {10.4064/fm-108-2-109-118},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-108-2-109-118/}
}