ARDJOUM, Safia, et al. “Contribution to the Characterization of Peri-Urban Natural Areas of Sidi Bel Abbes Town (Northwestern Algeria)”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 22, no. 2, May 2015, pp. 100-12, https://gssrr.org/JournalOfBasicAndApplied/article/view/3965.