Comment on "Two Dimensional Ordering and Fluctuations in alpha'-NaV2O5"
  We claim that the analysis presented by Gaulin et al. (Phys. Rev. Lett. 84, 3446 (2000)) does not prove the two-dimensional character of the transition in NaV2O5 nor the charge ordering mechanism of the transition. 
S. Ravy and J. E. Lorenzo