@article {1989,
	title = {Upper semicontinuous differential inclusions without convexity},
	journal = {Proc. Amer. Math. Soc.  106  (1989),  no. 3, 771-775},
	number = {SISSA;74/88/M},
	year = {1989},
	publisher = {SISSA Library},
	url = {http://hdl.handle.net/1963/670},
	author = {Alberto Bressan and Arrigo Cellina and Giovanni Colombo}
}
