Obstructions to Embedding and Isotopy in the Metastable Range.
On Quadratic Forms in 3-Manifolds.
On Representing Homology Classes of 4-Manifolds.
On surface braids of index four with at most two crossings
Let Γ be a 4-chart with at most two crossings. We show that if the closure of the surface braid obtained from Γ is one 2-sphere, then the sphere is a ribbon surface.
On the homotopy embeddability of complexes in Euclidean space. I. The weak thickening theorem.
On the homotopy invariance of configuration spaces.
On the planarity of 2-complexes
On the Space of the Linear Homeomorphisms of a Polyhedral TV-Cell with Two Interior Vertices*.