Harders, Levke (8. august 2019). «Belonging, Migration, and Profession in the German-Danish Border Region in the 1830s». Journal of Borderlands Studies. 4. 34: 571–585. ISSN0886-5655. doi:10.1080/08865655.2017.1402193. Besøkt 8. november 2020. «Although a unit of the Danish composite state, Holstein was a part of the German Confederation (Deutscher Bund). Based on dynastic claims of a premodern state, this division became more and more problematic in the “national” 19th century. Two wars (in 1848–51 and 1864) were waged to solve the dilemma, but in the end, these violent conflicts only ended up (re–)defining “national” borders (Göttsch-Elten 2011, 177).»
Harders, Levke (8. august 2019). «Belonging, Migration, and Profession in the German-Danish Border Region in the 1830s». Journal of Borderlands Studies. 4. 34: 571–585. ISSN0886-5655. doi:10.1080/08865655.2017.1402193. Besøkt 8. november 2020. «Although a unit of the Danish composite state, Holstein was a part of the German Confederation (Deutscher Bund). Based on dynastic claims of a premodern state, this division became more and more problematic in the “national” 19th century. Two wars (in 1848–51 and 1864) were waged to solve the dilemma, but in the end, these violent conflicts only ended up (re–)defining “national” borders (Göttsch-Elten 2011, 177).»