Tzvetan Todorov, The Fragility of Goodness: Why Bulgaria's Jews Survived the Holocaust (London, 1999); more generally, Friedländer, The Years of Extermination, 452, 485 (quoting Ribbentrop); Deletant, Hitler's Forgotten Ally, 198-204; Crampton, Bulgaria, 264-266; Stephane Groueff, Crown of Thoms: The Reign of King Boris III of Bulgaria, 1918—1943 (Lanham, Md., 1987), 316-331; and Frederick B. Chary, The Bulgarian Jews and the Final Solution, 1940—1944 (Pittsburgh, Pa., 1972).
