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• [2] José Adem, The iteration of the Steenrod squares in algebraic topology, Proc. Nat. Acad. Sci. U. S. A. 38 (1952), 720–726. MR 0050278
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• [4] Armand Borel, Impossibilité de fibrer une sphère par un produit de sphères, C. R. Acad. Sci. Paris 231 (1950), 943–945 (French). MR 0038656
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• [6] William Browder, The cohomology of covering spaces of 𝐻-spaces, Bull. Amer. Math. Soc. 65 (1959), 140–141. MR 0111024, https://doi.org/10.1090/S0002-9904-1959-10299-8
• [7] William Browder, Torsion in 𝐻-spaces, Ann. of Math. (2) 74 (1961), 24–51. MR 0124891, https://doi.org/10.2307/1970305
• [8] William Browder, Homotopy commutative 𝐻-spaces, Ann. of Math. (2) 75 (1962), 283–311. MR 0150778, https://doi.org/10.2307/1970175
• [9] William Browder, On differential Hopf algebras, Trans. Amer. Math. Soc. 107 (1963), 153–176. MR 0145530, https://doi.org/10.1090/S0002-9947-1963-0145530-7
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• [11] William Browder and Isaac Namioka, 𝐻-spaces with commutative homology rings, Ann. of Math. (2) 75 (1962), 449–451. MR 0148070, https://doi.org/10.2307/1970207
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• [13] James Eells Jr. and Nicolaas H. Kuiper, Closed manifolds which admit nondegenerate functions with three critical points, Nederl. Akad. Wetensch. Proc. Ser. A 64 = Indag. Math. 23 (1961), 411–417. MR 0139176
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J. Adem, The iteration of the Steenrod squares in algebraic topology, Proc. Nat. Acad. Sci. U.S.A. 38 (1952), 720-726. MR 0050278 (14:306e)

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W. Browder, The cohomology of covering spaces of H-spaces, Bull. Amer. Math. Soc. 65 (1959), 140-141. MR 0111024 (22:1891)

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W. Browder and I. Namioka, H-spaces with commutative homology rings, Ann. of Math. 75 (1962), (2) 449-451. MR 0148070 (26:5579)

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W. Browder and E. Thomas, On the projective plane of an H-space, Illinois J. Math. 7 (1963), 492-502. MR 0151974 (27:1955)

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J. Eells and N. H. Kuiper, Closed manifolds which admit non- degenerate functions with three critical points, Indag. Math. 23 (1961), 411-417. MR 0139176 (25:2612)

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S. Eilenberg and N. E. Steenrod, Foundations of algebraic topology, Princeton Univ. Press, Princeton, N.J., 1953.

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J.-P. Serre, Groupes d'homotopie et classes de groupes abéliens, Ann. of Math. (2) 58 (1953), 258-294. MR 0059548 (15:548c)

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