@article{SHC_1962-1963__15__A9_0,
     author = {Cerf, Jean},
     title = {La nullit\'e de $\pi _0${(Diff} $S^3$). 3. {Construction} d{\textquoteright}une section pour le rev\^etement $\mathfrak {R}$},
     journal = {S\'eminaire Henri Cartan},
     note = {talk:21},
     pages = {1--25},
     publisher = {Secr\'etariat math\'ematique},
     volume = {15},
     year = {1962-1963},
     zbl = {0117.16805},
     language = {fr},
     url = {http://www.numdam.org/item/SHC_1962-1963__15__A9_0/}
}