Marshall, Peter (September 2001): «The Balfour Formula and the Evolution of the Commonwealth», The Round Table90 (361), doi:10.1080/00358530120082823; s. 541–553
doi.org
McAllister, I. (2004): «’The Armalite and the ballot box’: Sinn Féin's electoral strategy in Northern Ireland», Electoral Studies. 23, doi:10.1016/j.electstud.2003.10.002; s. 123–142.
