Heppell, Timothy and Hill, Michael Iain (2010) The Voting Motivations of Conservative Parliamentarians in the Conservative Party Leadership Election of 2001. Politics, 30 (1). pp. 36-51. ISSN 0263-3957
Heppell, Timothy and Hill, Michael Iain (2009) Transcending Thatcherism? Ideology and the Conservative Party Leadership Mandate of David Cameron. The Political Quarterly, 80 (3). pp. 388-399. ISSN 00323179
Heppell, Timothy and Hill, Michael Iain (2008) The Conservative Party Leadership Election of 1997: An Analysis of the Voting Motivations of Conservative Parliamentarians. British Politics, 3 (1). pp. 63-91. ISSN 1746-918X