@article{BUMI_1951_3_6_1_a10,
     author = {Whitehead, J. H. C.},
     title = {Omotopia.},
     journal = {Bollettino della Unione matematica italiana},
     pages = {36--49},
     publisher = {mathdoc},
     volume = {Ser. 3, 6},
     number = {1},
     year = {1951},
     zbl = {0043.17701},
     mrnumber = {40001},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1951_3_6_1_a10/}
}