Mark Hewitson, "Germany and France before the First World War: A Reassessment of Wilhelmine Foreign Policy" English Historical Review (2000) 115#462 pp. 570-606 in JSTOR
Robert Jay, "Alphonse de Neuville's 'The Spy' and the Legacy of the Franco-Prussian War," Metropolitan Museum Journal (1984) 19: pp. 151-162 in JSTOR
Ulrich Krotz, "Three eras and possible futures: a long-term view on the Franco-German relationship a century after the First World War," International Affairs (March 2014) 90#2 pp 337-350. online