“R. Johansson, Small State Boundary Conflict. Belgium and the Belgian-German Border 1914-1919”. BMGN - Low Countries Historical Review 105, no. 4 (January 1, 1990): 654–655. Accessed November 23, 2024. https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-103775.