• ./edge-fig.ps
  A class of automorphism groups of polygonal complexes, Quart. J. Math 52 (2001), 231-247.
  
• ./invol2.ps
  Some infinite groups generated by involutions have Kazhdan's property (T), Forum Mathematicum 13 (2001), 741-755.
• ./graf2.ps
  Estimates for homological dimension of configuration spaces of graphs, Colloquium Math. 89 (2001), 69-79.
• ./grpr.dvi
  (with Tadeusz Januszkiewicz) Commensurability of graph products, Algebraic and Geometric Topology 1 (2001), 587-603.