@article{10_4064_cm_32_2_211_212,
     author = {Karol Borsuk},
     title = {Hopf's extension theorem in the theory of shape},
     journal = {Colloquium Mathematicum},
     pages = {211--212},
     publisher = {mathdoc},
     volume = {32},
     number = {2},
     year = {1974},
     doi = {10.4064/cm-32-2-211-212},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-32-2-211-212/}
}