Opérations cohomologiques, II
Séminaire Henri Cartan, Volume 7 (1954-1955) no. 2, Talk no. 15, 10 p.
@article{SHC_1954-1955__7_2_A4_0,
     author = {Cartan, Henri},
     title = {Op\'erations cohomologiques, II},
     journal = {S\'eminaire Henri Cartan},
     publisher = {Secr\'etariat math\'ematique},
     volume = {7},
     number = {2},
     year = {1954-1955},
     note = {talk:15},
     language = {fr},
     url = {http://www.numdam.org/item/SHC_1954-1955__7_2_A4_0}
}
Cartan, H. Opérations cohomologiques, II. Séminaire Henri Cartan, Volume 7 (1954-1955) no. 2, Talk no. 15, 10 p. http://www.numdam.org/item/SHC_1954-1955__7_2_A4_0/

[1] N. Steenrod, Cyclic reduced powers of cohomology classes, Proc. Nat. Acad. Sci. U.S.A., 39, 1953, p. 217-223 . | MR 54965 | Zbl 0050.39501