1. Binary operations on sets of mapping classes;Copeland, Arthur H., Jr.;Michigan Math. J.,1959
2. A natural transformation in homotopy theory and a theorem of G. W. Whitehead;Eckmann, B.;Math. Z.,1963
3. On 𝐻-spaces and their homotopy groups;James, I. M.;Quart. J. Math. Oxford Ser. (2),1960
4. Multiplications on products of spheres;Loibel, Gilberto Francisco;An. Acad. Brasil. Ci.,1959