Duncan Campbell en STOA 1999, vol. 2/5, citando el Baltimore Sun, America's fortress of Spies, de Scott Shane y Tom Bowmann, 3.12.1995, y el Washington Post, French Recent US Coups in New Espionnage, de William Drozdiak
Duncan Campbell in STOA 1999, Part 2/5, with reference to Baltimore Sun, America's Fortress of Spies, by Scott Shane and Tom Bowman, 3 December 1995, and Washington Post, Recent US Coups in New Espionnage, by William Drozdiak