@article {2011,
	title = {A uniqueness result for the continuity equation in two dimensions},
	number = {SISSA;52/2011/M},
	year = {2011},
	institution = {SISSA},
	url = {http://hdl.handle.net/1963/4663},
	author = {Giovanni Alberti and Stefano Bianchini and Gianluca Crippa}
}
