@article{SHC_1954-1955__7_2_A10_0, 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/} }
Serre, J. P. Groupes d'homotopie des bouquets de sphères. Séminaire Henri Cartan, Algèbre d'Eilenberg-Maclane et homotopie, Tome 7 (1954-1955) no. 2, Exposé no. 20, 7 p. http://archive.numdam.org/item/SHC_1954-1955__7_2_A10_0/
[1]. Products in homotopy theory. Ann. of Maths., vol. 58, 1953, p. 295-324. | MR | Zbl
and .[2]. On the Pontrjagin product in spaces of paths. Comm. Math. Helv., vol. 27, 1953, p. 320-337. | MR | Zbl
and .[3]. On the homotopy groups of the union of spheres. J. London Math. Soc., vol. 30, 1955, p. 154-171. | MR | Zbl
.[4]. A connection between the Whitehead and the Pontrjagin product. Amer. J. of Maths., vol. LXXV, 1953, p. 744-752. | MR | Zbl
.