BARAKAT, Ahmed, KHELLOUK, Rida, ENNAJI, Widad and MOSAID, Hassan. Investigation of heavy metal contamination and ecological and health risks in farmland soils from southeastern phosphate plateaus of Khouribga (Morocco). Ecological Questions. Online. 17 August 2022. Vol. 33, no. 4, pp. 61-75. [Accessed 26 February 2026]. DOI 10.12775/EQ.2022.036.