On 4-manifolds with free fundamental group. Friedrich Hegenbarth, Alberto Cavicchioli (1994) Forum mathematicum
On Manifolds Representing Homology Classes in Codimension 2. Emery Thomas, John Wood (1974) Inventiones mathematicae
On the group of homotopy equivalences of simply connected five manifolds. Hans Joachim Baues, Joachim Buth (1996) Mathematische Zeitschrift
On the homotopy embeddability of complexes in Euclidean space. I. The weak thickening theorem. John R. Klein (1993) Mathematische Zeitschrift
On the structure of 5-dimensional Poincaré duality spaces. Ralph Stöcker (1982) Commentarii mathematici Helvetici