www.univ-msila.dz/.../multimedia/.../Mémoire(BOUTAGHANE%20WAHIBA).pdf
www.almihlaj.net/pdf.php?id=374
www.alarabonline.org/Previouspages/Alarab%20Weekly/2010/.../p21.pdf
www.oujdia.info/news/pdf/show.php?id=3598
news.wata.cc/pdf.php?id=583
81.144.208.20:9090/pdf/2008/12/12-02/qad.pdf
ser-bu.univ-alger.dz/thesenum/MERIBEA_WAFIA.pdf
www.almihlaj.net/pdf.php?id=374
www.alarabonline.org/Previouspages/Alarab%20Weekly/2010/.../p21.pdf
www.oujdia.info/news/pdf/show.php?id=3598
news.wata.cc/pdf.php?id=583
81.144.208.20:9090/pdf/2008/12/12-02/qad.pdf
ser-bu.univ-alger.dz/thesenum/MERIBEA_WAFIA.pdf