Hassan, David, McCullough, Shane and Moreland, Elizabeth (2010) North or South? Darron Gibson and the Issue of Player Eligibility Within Irish Soccer. In: Why Minorities Play or Don't Play Soccer. Routledge, London, pp. 95-110. ISBN 978-0-415-49714-5 [Book section]

Hassan, David, McCullough, Shane and Moreland, Elizabeth (2009) North or South? Darron Gibson and the Issue of Player Eligibility within Irish Soccer. Soccer and Society, 10 (6). pp. 740-753. [Journal article]