The 3-cocycles of the Alexander quandles .
The algebraic characterization of the exteriors of certain 2-knots.
The cd-index of Bruhat intervals.
The Homotopoy Type of Four-Dimensional Knot Complements.
The Smale invariant of a knot.
Topology of families of affine plane curves
We determine bifurcation sets of families of affine curves and study the topology of such families.
Total curvature for knotted surfaces.
Toward a general theory of linking invariants.
Transversality Theories at Dimension Four.
Two-knot groups with torsion free abelian normal subgroups of rank two.