An axiomatic approach to homotopy theory without using the relative groups
Portugaliae mathematica, Tome 20 (1961) no. 2, pp. 95-103
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@article{PORMA_1961__20_2_114855,
author = {Hu, Sze-Tsen},
title = {An axiomatic approach to homotopy theory without using the relative groups},
journal = {Portugaliae mathematica},
pages = {95--103},
publisher = {mathdoc},
volume = {20},
number = {2},
year = {1961},
mrnumber = {0131273},
zbl = {0096.37503},
language = {en},
url = {http://geodesic.mathdoc.fr/item/PORMA_1961__20_2_114855/}
}
Hu, Sze-Tsen. An axiomatic approach to homotopy theory without using the relative groups. Portugaliae mathematica, Tome 20 (1961) no. 2, pp. 95-103. http://geodesic.mathdoc.fr/item/PORMA_1961__20_2_114855/