publication venue for On convergence of trajectory attractors of the 3D Navier - Stokes-$alpha$ model as $alpha$ approaches 0. 198:3-36. 2007 On the uniform distribution of orbits of finitely generated groups and semigroups of plane isometries. 195:17-40. 2004 Ergodicity of billiards in polygons. 188:65-112. 1997
