Homotopy negligible subsets

Eells, Jr., James; Kuiper, Nicolaas H.

Compositio Mathematica, Volume 21 (1969) p. 155-161

Manifolds which are like projective planes

Eells, James; Kuiper, Nicolaas H.

Publications Mathématiques de l'IHÉS, Volume 14 (1962) p. 5-46