1. Adriansen, I. (2003). Nationale symboler i Det Danske Rige, 1830−2000 [National symbols in the Danish realm, 1830−2000] (Vols. 1−2). Copenhagen: Museum Tusculanum Forlag.
2. Adriansen, I., & Christensen, J. O. (2013). The Second Schleswig War, 1864: Prelude, events and consequences. Odder: Museum Sønderjylland and Tøjhusmuseet.
3. Adriansen, I., & Christensen, J. O. (2015). The First Schleswig War, 1848−1851: Prelude, events and consequences. Varde: Museum Sønderjylland and Tøjhusmuseet.
4. Agnew, J. A. (1998). Geopolitics: Re-visioning world politics. Abingdon: Routledge.
5. Agnew, J. A. (2001). Reinventing geopolitics: Geographies of modern statehood. Hettner-Lecture: Vol. 4. Heidelberg: Department of Geography, Heidelberg University.