@article {5157,
	title = {Phase organization},
	journal = {Physical Review Letters},
	year = {1987},
	pages = {1161-1164},
	doi = {10.1103/PhysRevLett.58.1161},
	author = {Chao Tang and Kurt Wiesenfeld and Per Bak and Susan Coppersmith and Peter Littlewood}
}
