Exclusion Statistics in a trapped two-dimensional Bose gas
  We study the statistical mechanics of a two-dimensional gas with a repulsive delta function interaction, using a mean field approximation. By a direct counting of states we establish that this model obeys exclusion statistics and is equivalent to an ideal exclusion statistics gas. 
T. H. Hansson (University of Stockholm), J. M. Leinaas (University of   Oslo), and S. Viefers (Nordita)