http://applications.emro.who.int/docs/EM_RC52_7_ar.pdf
http://www.aljazeera.net/programs/religionandlife/2004/12/20/%D8%A7%D9%84%D8%A3%D8%AE%D9%84%D8%A7%D9%82%D9%8A%D8%A7%D8%AA-%D8%A7%D9%84%D8%B7%D8%A8%D9%8A%D8%A9-%D9%81%D9%8A-%D8%A7%D9%84%D8%A5%D8%B3%D9%84%D8%A7%D9%85
http://archive.aawsat.com/details.asp?article=287770&issueno=9602#.VuRggvl97IU
http://www.mohamoon-ksa.com/bog/default.aspx?action=PREVIEW_CONTENT&id=44991&TreeTypeID=4