Coethnicity: Diversity and the Dilemmas of Collective Action
Jeremy M. Weinstein, James Habyarimana, Macartan Humphreys, Daniel N. Posner
Russell Sage Foundation Publications (2009)

Why Does Ethnic Diversity Undermine Public Goods Provision?
James Habyarimana, Macartan Humphreys, Daniel N. Posner, Jeremy M. Weinstein
American Political Science Review vol. 101, 4 (2007)

Contemporary Identity Explosion, The: Individualizing Society in the Post-War Period
David John Frank, John Meyer
Sociological Theory vol. 20, 1 (2002)

Civil Wars and State-Building in Africa and Eurasia
Stephen J. Stedman, David Holloway
Woodrow Wilson Center Press, in "Beyond State Crisis: Postcolonial Africa and Post-Soviet Eurasia in Comparative Perspective" (2002)

Economic Interdependence and Independent Statehood
Stephen D. Krasner
Oxford University Press, in "States in a Changing World: An Analysis of Regional Experience" (1993)

Class, Ethnicity, and Democracy in Nigeria: The Failure of the First Republic
Larry Diamond
Syracuse University Press (1988)