@article{SHC_1950-1951__3__A4_0,
     author = {Cartan, H.},
     title = {Homologie des groupes. {IV} : homomorphismes de $\Pi $-complexes, applications},
     journal = {S\'eminaire Henri Cartan},
     note = {talk:4},
     pages = {1--11},
     publisher = {Secr\'etariat math\'ematique},
     volume = {3},
     year = {1950-1951},
     language = {fr},
     url = {http://www.numdam.org/item/SHC_1950-1951__3__A4_0/}
}