Ludendorff, Erich (1919) (på tyska). Mein Kriegserinnerungen 1914–1918 (My War Memoirs 1914–1918). Berlin: Ernst Siegfried Mittler und Sohn. sid. 565. https://archive.org/details/Ludendorff-Erich-Meine-Kriegserinnerungen "Because of the gravity of our position, the Supreme Command could not hope that air-raids on London and Paris would make the enemy more disposed to sue for peace. Permission was therefore refused for the use of a particularly effective incendiary bomb, expressly designed for attacks on the two capitals, which had been produced in great quantities during the month of August (1918) and which was to have been used in the air-bombardment of the two capitals. The considerable destruction which would have ensued would no longer be enough to influence the course of the war; one could not tolerate carrying out such destruction for its own sake."
