B. Eckmann, P. Hilton, “Groupes d'homotopie et dualité. Groupes absolus”, Matematika, 4:3 (1960), 3–28; C. R. Acad. Sci., Paris, 246 (1958), 2444–2447
1957
2.
P. J. Hilton, “On the homotopy groups of the union of spheres”, Matematika, 1:1 (1957), 19–36; J. London Math. Soc., 30 (1955), 154–172
Contact us: