References
Brown, E. H., jr.: Twisted tensor products, I. Ann. Math.69, 223 (1959).
Eckmann, B., andP. J. Hilton: Groupes d'homotopie et dualité. C. R. Acad. Sci. (Paris)246, 2444, 2555, 2991 (1958).
Fadell, E., andW. Hurewicz: On the structure of higher differental operators in spectral sequences. Ann. Math.68, 314 (1958).
Puppe, D.: Homotopiemengen und ihre induzierten Abbildungen. I. Math. Z.69, 299 (1958).
Spanier, E., andJ. H. C. Whitehead: On fibre spaces in which the fibre is contractible. Comm. Math. Helv.29, 1 (1955).
Steenrod, N. E.: Cohomology invariants of mappings. Ann. Math.50, 954 (1949).
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The second-named author was supported by the U. S. Office of Naval Research (Contract No. Nonr 401 (20) — NR 043-167) while preparing the material for this paper.
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Eckmann, B., Hilton, P.J. Operators and cooperators in homotopy theory. Math. Ann. 141, 1–21 (1960). https://doi.org/10.1007/BF01367447
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DOI: https://doi.org/10.1007/BF01367447