Source: http://old.elwahat.univ-ghardaia.dz/annonce/vol8%20n1/SA/Inventaire%20%20et%20analyse%20%20de%20la%20biodiversit%C3%A9%20v%C3%A9g%C3%A9tale%20dans%20la%20r%C3%A9gion%20de%20Gharda%C3%AFa%20_cas%20de%20hassi%20el%20fhal_.pdf