@article {2002,
	title = {On the Stability of the Standard Riemann Semigroup},
	journal = {P. Am. Math. Soc., 2002, 130, 1961},
	number = {SISSA;71/00/M},
	year = {2002},
	publisher = {SISSA Library},
	url = {http://hdl.handle.net/1963/1528},
	author = {Stefano Bianchini and Rinaldo M. Colombo}
}
