Duality for location problems with unbounded unit balls. - Gert Wanka; Radu Ioan Bot; Emese Vargyas (Eur. J. Oper. Res., 2007)

On the relations between different duals assigned to composed optimization problems. - Gert Wanka; Radu Ioan Bot; Emese Vargyas (Math. Methods Oper. Res., 2007)