@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} }