@article {6340,
	title = {Dynamical or Landau instability? (multiple letters)},
	journal = {Physical Review Letters},
	year = {2002},
	pages = {088901/1-088902/1},
	author = {Biao Wu and Qian Niu and S. Burger and F.S. Cataliotti and C. Fort and F. Minardi and M. Inguscio and M.L. Chiofalo and M.P. Tosi}
}
