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 25 December 2025]. DOI 10.12775/EQ.2022.036.