http://dspace.univ-jijel.dz:8080/xmlui/bitstream/handle/123456789/11943/%d8%a7%d9%84%d8%af%d8%b9%d9%88%d9%89%20%d8%a7%d9%84%d8%a7%d8%b3%d8%aa%d8%b9%d8%ac%d8%a7%d9%84%d9%8a%d8%a9%20%d9%81%d9%8a%20%d8%a7%d9%84%d9%85%d8%a7%d8%af%d8%a9%20%d8%a7%d9%84%d8%a5%d8%af%d8%a7%d8%b1%d9%8a%d8%a9.pdf?sequence=1&isAllowed=y
https://www.asjp.cerist.dz/en/article/50106
https://www.univ-oran2.dz/images/these_memoires/FDSP/Magister/THA3014.pdf