In 1975, while working as a research assistant at the University of Antwerp, Reyntjens was asked to be involved in a project that involved running a law school at the National University of Rwanda, in Butare.[3] This began a long affiliation with Rwanda. His PhD Thesis: 'Power and Law in Rwanda. Public Law and Political Evolution, 1916-1973' (Original French: Pouvoir et droit au Rwanda. Droit public et évolution politique, 1916-1973), was completed in 1983, and later published as a book in 1985.[4] After this, his research widened from Rwanda to the Great Lakes Region as a whole - publishing work on Burundi and on the Democratic Republic of Congo.
Reyntjens, Filip (1994). L'Afrique des grands lacs en crise. Paris: Karthala. ISBN9782865375080.
Reyntjens, Filip (1995). Rwanda: trois jours qui ont fait basculer l'histoire. Brussels: Institut Africain.
Reyntjens, Filip (2009). The Great African War: Congo and Regional Geopolitics, 1996-2006. Cambridge University Press. ISBN978-0-521-11128-7.[6][7][8][9][10]
Reyntjens, Filip (2013). Political Governance in Post-Genocide Rwanda. Cambridge University Press. ISBN978-1-107-04355-8.[11]
^Thomson, Susan (2011). "A Review of "The Great African War: Congo and Regional Geopolitics, 1996–2006": Reyntjens, Filip, New York: Cambridge University Press, 340 pp., $28.99, ISBN 978-0521169059, Publication Date: August 2010". History: Reviews of New Books. 39 (3): 93–94. doi:10.1080/03612759.2011.557958. S2CID143277988.
^Sapiano, J. (2010). "The Great African War: Congo and Regional Geopolitics, 1996-2006, by Filip Reyntjens". African Affairs. 109 (437): 682–683. doi:10.1093/afraf/adq055.
^Harris, Geoff (2012). "The Great African War: Congo and regional geopolitics, 1996–2006, and: The Trouble with the Congo: local violence and the failure of international peacebuilding (review)". Transformation: Critical Perspectives on Southern Africa. 80 (1): 91–93. doi:10.1353/trn.2012.0051. S2CID154414917.
^Day, Christopher (2017). "Political governance in post-genocide Rwanda". African Affairs. 116 (465): 723–724. doi:10.1093/afraf/adx035.