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J. F. Adams, The sphere, considered as an H-space , Quart. J. Math. Oxford Ser. (2) 12 (1961), 52-60. MR 0123323 (23:A651)

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H. Cartan, Séminaire, École Normale Supérieure 1959-60.

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A. Dold and R. Lashof, Principal quasifibrations and fibre homotopy equivalence of bundles, Illinois J. Math. 3 (1959), 285-305. MR 0101521 (21:331)

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A. Dold and R. Thom, Quasifaserungen und unendliche symmetrische Produkte, Ann. of Math. (2) 67 (1958), 239-281. MR 0097062 (20:3542)

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I. M. James, Multiplications on spheres. II, Trans. Amer. Math. Soc. 84 (1957), 545-558. MR 0090812 (19:875e)

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-, Reduced product spaces, Ann. of Math. (2) 62 (1955), 170-197. MR 0073181 (17:396b)

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J. Milnor, Construction of universal bundles. II, Ann. of Math. (2) 63 (1956), 430-436. MR 0077932 (17:1120a)

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J. C. Moore, The double suspension and p-primary components of the homotopy groups of spheres, Bol. Soc. Mat. Mexicana 1 (1956), 28-37. MR 0092967 (19:1188f)

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Y. Nomura, On mapping sequences, Nagoya Math. J. 17 (1960), 111-145. MR 0132545 (24:A2385)

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J. P. Serre, Groupes d'homotopie et classes de groupes abéliens, Ann. of Math. (2) 58 (1953), 285-294. MR 0059548 (15:548c)

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J. D. Stasheff, On homotopy Abelian H-spaces, Proc. Cambridge Philos. Soc. 57 (1961), 734-745. MR 0141123 (25:4534)

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M. Sugawara, A condition that a space is group-like, Math. J. Okayama Univ. 7 (1957), 123-149. MR 0097066 (20:3546)

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J. H. C. Whitehead, Combinatorial homotopy. I, Bull. Amer. Math. Soc. 55 (1949), 213-245. MR 0030759 (11:48b)