Morgan, William G. (1969). «The Origin and Development of the Congressional Nominating Caucus». Proceedings of the American Philosophical Society113 (2): 184-196. JSTOR985965.
Bruce Ackerman and David Fontana, "How Jefferson Counted Himself In," The Atlantic, March 2004. See also: Bruce Ackerman and David Fontana, "Thomas Jefferson Counts Himself into the Presidency," (2004), 90 Virginia Law Review 551-643. (en inglés)