@article {1991,
	title = {On systems of ordinary differential equations with measures as controls},
	journal = {Differential Integral Equations 4 (1991), no.4, p.739-765.},
	number = {SISSA;82/89/M},
	year = {1991},
	publisher = {SISSA Library},
	url = {http://hdl.handle.net/1963/840},
	author = {Gianni Dal Maso and Franco Rampazzo}
}
@article {1988,
	title = {On differential systems with vector-valued impulsive controls.},
	journal = {Boll. Un. Mat. Ital. B (7)  2  (1988),  no. 3, 641-656},
	number = {SISSA;54/87/M},
	year = {1988},
	publisher = {SISSA Library},
	url = {http://hdl.handle.net/1963/535},
	author = {Alberto Bressan and Franco Rampazzo}
}
