How Does a Dipolar Bose-Einstein Condensate Collapse?
  We emphasize that the macroscopic collapse of a dipolar Bose-Einstein condensate in a pancake-shaped trap occurs through local density fluctuations, rather than through a global collapse to the trap center. This hypothesis is supported by a recent experiment in a chromium condensate. 
J. L. Bohn, R. M. Wilson, and S. Ronen