A. E. Ylönen,  "Confronting the ‘Arab North’: Interpretations of Slavery and Religion in Southern Sudanese Separatist Resistance", in Fluid Networks and Hegemonic Powers in the Western Indian Ocean, Taylor, I.; Ramos M. J.; Kaarsholm, P. , Ed., Lisboa, Centro de Estudos Internacionais, ISCTE-IUL, 2017, pp. 103-129