Normal all pseudo-Anosov subgroups of mapping class groups.
On a class of spaces for which the fixed-point property is characterized by homology groups
On a shape characterization of some two-polyhedra
On central extensions of mapping class groups.
On face vectors of trivalent maps
On homology of real algebraic sets.
On indecomposable subcontinua of surfaces
On non-separating simple closed curves in a compact surface.
On Regular Homotopy of Branched Coverings of the Sphere.
On signatures and a subgroup of a central extension to the mapping class group.
On smooth structures of potential surfaces of general type homeomorphic to rational surfaces.
On the classification of compact surfaces admitting cellular decompositions. (Sur la classification des surfaces compactes qui admettent décomposition cellulaire.)
On the Farrell cohomology of mapping class groups.
On the forcing relation for surface homeomorphisms
On the Homeotopy Groups of Surfaces.
On the linearity problem for mapping class groups.
On the Space of the Linear Homeomorphisms of a Polyhedral TV-Cell with Two Interior Vertices*.
Orientation Reversing Morse-Smale Diffeomorphisms of S2.
Pappus's theorem and the modular group
Peripheral Structure of 3-Manifolds