Bowden, Christopher G. R.; Smith, Ken W.; El Bekkay, Mohammed; Oubrou, Widade; Aghnaj, Ali; Jimenez-Armesto, Maria. Contribution of research to conservation action for the Northern Bald Ibis Geronticus eremita in Morocco. 18, 2008, p. S74–S90. DOI10.1017/S0959270908000403.
Ait Alla, A.; P. Gilletb, B. Deutschc, A. Moukrima, and H. Bergayou. Response of Nereis diversicolor (Polychaeta, Nereidae) populations to reduced wastewater discharge in the polluted estuary of Oued Souss, Bay of Agadir, Morocco. 70, 2006, p. S633–S642. DOI10.1016/j.ecss.2006.01.028.