Riley 2019, p. 139. Riley, Emily (2019). ""Guests of God": The Layene, an Urban Sufi Community of Dakar, Senegal". Africa Today. 66 (1): 116–140. doi:10.2979/africatoday.66.1.06.
Charles 1977, p. 3. Charles, Eunice A. (1977). Precolonial Senegal: the Jolof Kingdom, 1800-1890. Boston: African Studies Center, Boston University. OCLC245867245.
Diouf 1987, pp. 22–66. Diouf, Babacar Sedikh (1987). Maad a sinig: Kumba Ndoofeen fa Maak JUUF (Buka-Cilaas), 1853–1871 [The Signing of Kumba Ndofeen with Mark Juuf (Buka-Chilaas), 1853–1871] (in Wolof). Dakar: PAPF. OCLC54639013.