@article{10_4064_fm_48_3_271_276,
     author = {M. Fort},
     title = {Extension of the set on which mappings into {Sn} are homotopic},
     journal = {Fundamenta Mathematicae},
     pages = {271--276},
     publisher = {mathdoc},
     volume = {48},
     number = {3},
     year = {1959},
     doi = {10.4064/fm-48-3-271-276},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-48-3-271-276/}
}