al-Bara, Yahya Ould. "The past and present of the ghuẓfiyya Sufi order from the western regions of the Sahara." State, Society and Islam in the Western Regions of the Sahara: Regional Interactions and Social Change. Ed. Francisco Freire. London,: I.B. Tauris, 2022. 261–288.

al-Bara, Yahya Ould. "The past and present of the ghuẓfiyya Sufi order from the western regions of the Sahara." State, Society and Islam in the Western Regions of the Sahara: Regional Interactions and Social Change. Ed. Francisco Freire. London,: I.B. Tauris, 2022. 261–288. Bloomsbury Collections. Web. 3 Sep. 2022.