FERAHTIA, Amel, et al. “SURFACE WATER QUALITY ASSESSMENT IN SEMI-ARID REGION (EL HODNA WATERSHED, ALGERIA) BASED ON WATER QUALITY INDEX (WQI)”. Studia Universitatis Babeș-Bolyai Chemia, vol. 66, no. 1, Mar. 2021, pp. 127-42, doi:10.24193/subbchem.2021.1.10.