@article {1990,
	title = {A general chain rule for distributional derivatives},
	journal = {Proc. Amer. Math. Soc.  108  (1990),  no. 3, 691-702},
	number = {SISSA;54/88/M},
	year = {1990},
	publisher = {SISSA Library},
	url = {http://hdl.handle.net/1963/650},
	author = {Luigi Ambrosio and Gianni Dal Maso}
}
