Hedberg, Peter / Häggqvist, Henric: Wartime trade and tariffs in Sweden from the Napoleonic Wars to World War I, in: Eloranta, Jari / Golson, Eric / Hedburg, Peter (eds.): Small and medium powers in global history: trade, conflicts and neutrality from the 18th to the 20th centuries (Perspectives in economic and social history 54), New York 2019 Routledge.