no. 2
Relations entre opérations cohomologiques secondaires
Séminaire Henri Cartan, Tome 11 (1958-1959) no. 2, Exposé no. 17, 10 p. 
@article{SHC_1958-1959__11_2_A8_0,
     author = {Cartan, Henri},
     title = {Relations entre op\'erations cohomologiques secondaires},
     journal = {S\'eminaire Henri Cartan},
     note = {talk:17},
     pages = {1--10},
     publisher = {Secr\'etariat math\'ematique},
     volume = {11},
     number = {2},
     year = {1958-1959},
     language = {fr},
     url = {http://archive.numdam.org/item/SHC_1958-1959__11_2_A8_0/}
}
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Cartan, Henri. Relations entre opérations cohomologiques secondaires. Séminaire Henri Cartan, Tome 11 (1958-1959) no. 2, Exposé no. 17, 10 p. http://archive.numdam.org/item/SHC_1958-1959__11_2_A8_0/

[1] Adams (J.F.). - Non-existence of elements of Hopf-invariant one. - Princeton, 1958, multigraphié.