no. 2
Groupes d'homotopie des bouquets de sphères
Séminaire Henri Cartan, Tome 7 (1954-1955) no. 2, Exposé no. 20, 7 p. 
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     author = {Serre, J. P.},
     title = {Groupes d'homotopie des bouquets de sph\`eres},
     journal = {S\'eminaire Henri Cartan},
     note = {talk:20},
     pages = {1--7},
     publisher = {Secr\'etariat math\'ematique},
     volume = {7},
     number = {2},
     year = {1954-1955},
     language = {fr},
     url = {http://archive.numdam.org/item/SHC_1954-1955__7_2_A10_0/}
}
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Serre, J. P. Groupes d'homotopie des bouquets de sphères. Séminaire Henri Cartan, Tome 7 (1954-1955) no. 2, Exposé no. 20, 7 p. http://archive.numdam.org/item/SHC_1954-1955__7_2_A10_0/

[1]. A.L. Blakers and W.S. Massey. Products in homotopy theory. Ann. of Maths., vol. 58, 1953, p. 295-324. | MR | Zbl

[2]. R. Bott and H. Samelson. On the Pontrjagin product in spaces of paths. Comm. Math. Helv., vol. 27, 1953, p. 320-337. | MR | Zbl

[3]. P.J. Hilton. On the homotopy groups of the union of spheres. J. London Math. Soc., vol. 30, 1955, p. 154-171. | MR | Zbl

[4]. H. Samelson. A connection between the Whitehead and the Pontrjagin product. Amer. J. of Maths., vol. LXXV, 1953, p. 744-752. | MR | Zbl