@article{SHC_1958-1959__11_1_A4_0,
     author = {Demazure, Michel},
     title = {Th\'eor\`emes de {Hurewicz} et {Whitehead}},
     journal = {S\'eminaire Henri Cartan},
     note = {talk:4},
     pages = {1--13},
     publisher = {Secr\'etariat math\'ematique},
     volume = {11},
     number = {1},
     year = {1958-1959},
     language = {fr},
     url = {http://www.numdam.org/item/SHC_1958-1959__11_1_A4_0/}
}