Obstruction Theory in Fiber Spaces.
On diffeomorphisms over surfaces trivially embedded in the 4-sphere.
On Embedded Spheres in 3-manifolds.
On embedding curves in two-dimensional polyhedra
On embedding of curves into two-dimensional polyhedra
On Manifolds Representing Homology Classes in Codimension 2.
On the embedding of coverings into 1-dimensional bundles.
On the scarcity of tame disks in certain mild cells
On the self-intersection set and the image on a generic map.